diff --git a/models/database/__init__.py b/models/database/__init__.py
index 6f7467fb..b290d6d7 100644
--- a/models/database/__init__.py
+++ b/models/database/__init__.py
@@ -21,7 +21,7 @@ from .customer import Customer, CustomerAddress
 from .inventory import Inventory
 from .letzshop import (
     LetzshopFulfillmentQueue,
-    LetzshopOrder,
+    LetzshopHistoricalImportJob,
     LetzshopSyncLog,
     VendorLetzshopCredentials,
 )
@@ -91,7 +91,7 @@ __all__ = [
     "OrderItem",
     # Letzshop Integration
     "VendorLetzshopCredentials",
-    "LetzshopOrder",
     "LetzshopFulfillmentQueue",
     "LetzshopSyncLog",
+    "LetzshopHistoricalImportJob",
 ]
diff --git a/models/database/letzshop.py b/models/database/letzshop.py
index 8222c5f4..03e33632 100644
--- a/models/database/letzshop.py
+++ b/models/database/letzshop.py
@@ -4,9 +4,12 @@ Database models for Letzshop marketplace integration.
 
 Provides models for:
 - VendorLetzshopCredentials: Per-vendor API key storage (encrypted)
-- LetzshopOrder: External order tracking and mapping
 - LetzshopFulfillmentQueue: Outbound operation queue with retry
 - LetzshopSyncLog: Audit trail for sync operations
+- LetzshopHistoricalImportJob: Progress tracking for historical imports
+
+Note: Orders are now stored in the unified `orders` table with channel='letzshop'.
+The LetzshopOrder model has been removed in favor of the unified Order model.
 """
 
 from sqlalchemy import (
@@ -61,99 +64,24 @@ class VendorLetzshopCredentials(Base, TimestampMixin):
         return f"<VendorLetzshopCredentials(vendor_id={self.vendor_id}, auto_sync={self.auto_sync_enabled})>"
 
 
-class LetzshopOrder(Base, TimestampMixin):
-    """
-    Letzshop order tracking and mapping.
-
-    Stores imported orders from Letzshop with mapping to local Order model.
-    """
-
-    __tablename__ = "letzshop_orders"
-
-    id = Column(Integer, primary_key=True, index=True)
-    vendor_id = Column(Integer, ForeignKey("vendors.id"), nullable=False, index=True)
-
-    # Letzshop identifiers
-    letzshop_order_id = Column(String(100), nullable=False, index=True)
-    letzshop_shipment_id = Column(String(100), nullable=True, index=True)
-    letzshop_order_number = Column(String(100), nullable=True)
-
-    # Local order mapping (if imported to local system)
-    local_order_id = Column(Integer, ForeignKey("orders.id"), nullable=True)
-
-    # Order state from Letzshop
-    letzshop_state = Column(String(50), nullable=True)  # unconfirmed, confirmed, etc.
-
-    # Customer info from Letzshop
-    customer_email = Column(String(255), nullable=True)
-    customer_name = Column(String(255), nullable=True)
-
-    # Order totals from Letzshop
-    total_amount = Column(
-        String(50), nullable=True
-    )  # Store as string to preserve format
-    currency = Column(String(10), default="EUR")
-
-    # Customer preferences (for invoicing)
-    customer_locale = Column(String(10), nullable=True)  # en, fr, de
-
-    # Shipping/billing country
-    shipping_country_iso = Column(String(5), nullable=True)  # LU, DE, FR, etc.
-    billing_country_iso = Column(String(5), nullable=True)
-
-    # Raw data storage (for debugging/auditing)
-    raw_order_data = Column(JSON, nullable=True)
-
-    # Inventory units (from Letzshop)
-    inventory_units = Column(JSON, nullable=True)  # List of inventory unit IDs
-
-    # Sync status
-    sync_status = Column(
-        String(50), default="pending"
-    )  # pending, imported, confirmed, rejected, shipped
-    last_synced_at = Column(DateTime(timezone=True), nullable=True)
-    sync_error = Column(Text, nullable=True)
-
-    # Fulfillment status
-    confirmed_at = Column(DateTime(timezone=True), nullable=True)
-    rejected_at = Column(DateTime(timezone=True), nullable=True)
-    tracking_set_at = Column(DateTime(timezone=True), nullable=True)
-    tracking_number = Column(String(100), nullable=True)
-    tracking_carrier = Column(String(100), nullable=True)
-
-    # Relationships
-    vendor = relationship("Vendor")
-    local_order = relationship("Order")
-
-    __table_args__ = (
-        Index("idx_letzshop_order_vendor", "vendor_id", "letzshop_order_id"),
-        Index("idx_letzshop_order_state", "vendor_id", "letzshop_state"),
-        Index("idx_letzshop_order_sync", "vendor_id", "sync_status"),
-    )
-
-    def __repr__(self):
-        return f"<LetzshopOrder(id={self.id}, letzshop_id='{self.letzshop_order_id}', state='{self.letzshop_state}')>"
-
-
 class LetzshopFulfillmentQueue(Base, TimestampMixin):
     """
     Queue for outbound fulfillment operations to Letzshop.
 
     Supports retry logic for failed operations.
+    References the unified orders table.
     """
 
     __tablename__ = "letzshop_fulfillment_queue"
 
     id = Column(Integer, primary_key=True, index=True)
     vendor_id = Column(Integer, ForeignKey("vendors.id"), nullable=False, index=True)
-    letzshop_order_id = Column(
-        Integer, ForeignKey("letzshop_orders.id"), nullable=False
-    )
+    order_id = Column(Integer, ForeignKey("orders.id"), nullable=False, index=True)
 
     # Operation type
     operation = Column(
         String(50), nullable=False
-    )  # confirm, reject, set_tracking, return
+    )  # confirm_item, decline_item, set_tracking
 
     # Operation payload
     payload = Column(JSON, nullable=False)
@@ -174,15 +102,16 @@ class LetzshopFulfillmentQueue(Base, TimestampMixin):
 
     # Relationships
     vendor = relationship("Vendor")
-    letzshop_order = relationship("LetzshopOrder")
+    order = relationship("Order")
 
     __table_args__ = (
         Index("idx_fulfillment_queue_status", "status", "vendor_id"),
         Index("idx_fulfillment_queue_retry", "status", "next_retry_at"),
+        Index("idx_fulfillment_queue_order", "order_id"),
     )
 
     def __repr__(self):
-        return f"<LetzshopFulfillmentQueue(id={self.id}, operation='{self.operation}', status='{self.status}')>"
+        return f"<LetzshopFulfillmentQueue(id={self.id}, order_id={self.order_id}, operation='{self.operation}', status='{self.status}')>"
 
 
 class LetzshopSyncLog(Base, TimestampMixin):
@@ -228,3 +157,60 @@ class LetzshopSyncLog(Base, TimestampMixin):
 
     def __repr__(self):
         return f"<LetzshopSyncLog(id={self.id}, type='{self.operation_type}', status='{self.status}')>"
+
+
+class LetzshopHistoricalImportJob(Base, TimestampMixin):
+    """
+    Track progress of historical order imports from Letzshop.
+
+    Enables real-time progress tracking via polling for long-running imports.
+    """
+
+    __tablename__ = "letzshop_historical_import_jobs"
+
+    id = Column(Integer, primary_key=True, index=True)
+    vendor_id = Column(Integer, ForeignKey("vendors.id"), nullable=False, index=True)
+    user_id = Column(Integer, ForeignKey("users.id"), nullable=False)
+
+    # Status: pending | fetching | processing | completed | failed
+    status = Column(String(50), default="pending", nullable=False)
+
+    # Current phase: "confirmed" | "declined"
+    current_phase = Column(String(20), nullable=True)
+
+    # Fetch progress
+    current_page = Column(Integer, default=0)
+    total_pages = Column(Integer, nullable=True)  # null = unknown yet
+    shipments_fetched = Column(Integer, default=0)
+
+    # Processing progress
+    orders_processed = Column(Integer, default=0)
+    orders_imported = Column(Integer, default=0)
+    orders_updated = Column(Integer, default=0)
+    orders_skipped = Column(Integer, default=0)
+
+    # EAN matching stats
+    products_matched = Column(Integer, default=0)
+    products_not_found = Column(Integer, default=0)
+
+    # Phase-specific stats (stored as JSON for combining confirmed + declined)
+    confirmed_stats = Column(JSON, nullable=True)
+    declined_stats = Column(JSON, nullable=True)
+
+    # Error handling
+    error_message = Column(Text, nullable=True)
+
+    # Timing
+    started_at = Column(DateTime(timezone=True), nullable=True)
+    completed_at = Column(DateTime(timezone=True), nullable=True)
+
+    # Relationships
+    vendor = relationship("Vendor")
+    user = relationship("User")
+
+    __table_args__ = (
+        Index("idx_historical_import_vendor", "vendor_id", "status"),
+    )
+
+    def __repr__(self):
+        return f"<LetzshopHistoricalImportJob(id={self.id}, status='{self.status}', phase='{self.current_phase}')>"
diff --git a/models/database/order.py b/models/database/order.py
index 33ec3fa7..efe4dfa6 100644
--- a/models/database/order.py
+++ b/models/database/order.py
@@ -1,4 +1,17 @@
 # models/database/order.py
+"""
+Unified Order model for all sales channels.
+
+Supports:
+- Direct orders (from vendor's own storefront)
+- Marketplace orders (Letzshop, etc.)
+
+Design principles:
+- Customer/address data is snapshotted at order time (preserves history)
+- customer_id FK links to Customer record (may be inactive for marketplace imports)
+- channel field distinguishes order source
+- external_* fields store marketplace-specific references
+"""
 
 from sqlalchemy import (
     Boolean,
@@ -6,6 +19,7 @@ from sqlalchemy import (
     DateTime,
     Float,
     ForeignKey,
+    Index,
     Integer,
     String,
     Text,
@@ -18,7 +32,12 @@ from models.database.base import TimestampMixin
 
 
 class Order(Base, TimestampMixin):
-    """Customer orders."""
+    """
+    Unified order model for all sales channels.
+
+    Stores orders from direct sales and marketplaces (Letzshop, etc.)
+    with snapshotted customer and address data.
+    """
 
     __tablename__ = "orders"
 
@@ -27,69 +46,130 @@ class Order(Base, TimestampMixin):
     customer_id = Column(
         Integer, ForeignKey("customers.id"), nullable=False, index=True
     )
+    order_number = Column(String(100), nullable=False, unique=True, index=True)
 
-    order_number = Column(String, nullable=False, unique=True, index=True)
-
-    # Order channel/source
+    # === Channel/Source ===
     channel = Column(
-        String(50), default="direct", index=True
-    )  # direct, letzshop, amazon, etc.
+        String(50), default="direct", nullable=False, index=True
+    )  # direct, letzshop
+
+    # External references (for marketplace orders)
     external_order_id = Column(
         String(100), nullable=True, index=True
-    )  # External order reference
-    external_channel_data = Column(JSON, nullable=True)  # Channel-specific metadata
+    )  # Marketplace order ID
+    external_shipment_id = Column(
+        String(100), nullable=True, index=True
+    )  # Marketplace shipment ID
+    external_order_number = Column(String(100), nullable=True)  # Marketplace order #
+    external_data = Column(JSON, nullable=True)  # Raw marketplace data for debugging
 
-    # Order status
-    status = Column(String, nullable=False, default="pending", index=True)
-    # pending, processing, shipped, delivered, cancelled, refunded
+    # === Status ===
+    # pending: awaiting confirmation
+    # processing: confirmed, being prepared
+    # shipped: shipped with tracking
+    # delivered: delivered to customer
+    # cancelled: order cancelled/declined
+    # refunded: order refunded
+    status = Column(String(50), nullable=False, default="pending", index=True)
 
-    # Financial
-    subtotal = Column(Float, nullable=False)
-    tax_amount = Column(Float, default=0.0)
-    shipping_amount = Column(Float, default=0.0)
-    discount_amount = Column(Float, default=0.0)
+    # === Financials ===
+    subtotal = Column(Float, nullable=True)  # May not be available from marketplace
+    tax_amount = Column(Float, nullable=True)
+    shipping_amount = Column(Float, nullable=True)
+    discount_amount = Column(Float, nullable=True)
     total_amount = Column(Float, nullable=False)
-    currency = Column(String, default="EUR")
+    currency = Column(String(10), default="EUR")
 
-    # Addresses (stored as IDs)
-    shipping_address_id = Column(
-        Integer, ForeignKey("customer_addresses.id"), nullable=False
-    )
-    billing_address_id = Column(
-        Integer, ForeignKey("customer_addresses.id"), nullable=False
-    )
+    # === Customer Snapshot (preserved at order time) ===
+    customer_first_name = Column(String(100), nullable=False)
+    customer_last_name = Column(String(100), nullable=False)
+    customer_email = Column(String(255), nullable=False)
+    customer_phone = Column(String(50), nullable=True)
+    customer_locale = Column(String(10), nullable=True)  # en, fr, de, lb
 
-    # Shipping
-    shipping_method = Column(String, nullable=True)
-    tracking_number = Column(String, nullable=True)
+    # === Shipping Address Snapshot ===
+    ship_first_name = Column(String(100), nullable=False)
+    ship_last_name = Column(String(100), nullable=False)
+    ship_company = Column(String(200), nullable=True)
+    ship_address_line_1 = Column(String(255), nullable=False)
+    ship_address_line_2 = Column(String(255), nullable=True)
+    ship_city = Column(String(100), nullable=False)
+    ship_postal_code = Column(String(20), nullable=False)
+    ship_country_iso = Column(String(5), nullable=False)
 
-    # Notes
+    # === Billing Address Snapshot ===
+    bill_first_name = Column(String(100), nullable=False)
+    bill_last_name = Column(String(100), nullable=False)
+    bill_company = Column(String(200), nullable=True)
+    bill_address_line_1 = Column(String(255), nullable=False)
+    bill_address_line_2 = Column(String(255), nullable=True)
+    bill_city = Column(String(100), nullable=False)
+    bill_postal_code = Column(String(20), nullable=False)
+    bill_country_iso = Column(String(5), nullable=False)
+
+    # === Tracking ===
+    shipping_method = Column(String(100), nullable=True)
+    tracking_number = Column(String(100), nullable=True)
+    tracking_provider = Column(String(100), nullable=True)
+
+    # === Notes ===
     customer_notes = Column(Text, nullable=True)
     internal_notes = Column(Text, nullable=True)
 
-    # Timestamps
-    paid_at = Column(DateTime, nullable=True)
-    shipped_at = Column(DateTime, nullable=True)
-    delivered_at = Column(DateTime, nullable=True)
-    cancelled_at = Column(DateTime, nullable=True)
+    # === Timestamps ===
+    order_date = Column(
+        DateTime(timezone=True), nullable=False
+    )  # When customer placed order
+    confirmed_at = Column(DateTime(timezone=True), nullable=True)
+    shipped_at = Column(DateTime(timezone=True), nullable=True)
+    delivered_at = Column(DateTime(timezone=True), nullable=True)
+    cancelled_at = Column(DateTime(timezone=True), nullable=True)
 
-    # Relationships
+    # === Relationships ===
     vendor = relationship("Vendor")
     customer = relationship("Customer", back_populates="orders")
     items = relationship(
         "OrderItem", back_populates="order", cascade="all, delete-orphan"
     )
-    shipping_address = relationship(
-        "CustomerAddress", foreign_keys=[shipping_address_id]
+
+    # Composite indexes for common queries
+    __table_args__ = (
+        Index("idx_order_vendor_status", "vendor_id", "status"),
+        Index("idx_order_vendor_channel", "vendor_id", "channel"),
+        Index("idx_order_vendor_date", "vendor_id", "order_date"),
     )
-    billing_address = relationship("CustomerAddress", foreign_keys=[billing_address_id])
 
     def __repr__(self):
-        return f"<Order(id={self.id}, order_number='{self.order_number}', status='{self.status}')>"
+        return f"<Order(id={self.id}, order_number='{self.order_number}', channel='{self.channel}', status='{self.status}')>"
+
+    @property
+    def customer_full_name(self) -> str:
+        """Customer full name from snapshot."""
+        return f"{self.customer_first_name} {self.customer_last_name}".strip()
+
+    @property
+    def ship_full_name(self) -> str:
+        """Shipping address full name."""
+        return f"{self.ship_first_name} {self.ship_last_name}".strip()
+
+    @property
+    def bill_full_name(self) -> str:
+        """Billing address full name."""
+        return f"{self.bill_first_name} {self.bill_last_name}".strip()
+
+    @property
+    def is_marketplace_order(self) -> bool:
+        """Check if this is a marketplace order."""
+        return self.channel != "direct"
 
 
 class OrderItem(Base, TimestampMixin):
-    """Individual items in an order."""
+    """
+    Individual items in an order.
+
+    Stores product snapshot at time of order plus external references
+    for marketplace items.
+    """
 
     __tablename__ = "order_items"
 
@@ -97,21 +177,48 @@ class OrderItem(Base, TimestampMixin):
     order_id = Column(Integer, ForeignKey("orders.id"), nullable=False, index=True)
     product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
 
-    # Product details at time of order (snapshot)
-    product_name = Column(String, nullable=False)
-    product_sku = Column(String, nullable=True)
+    # === Product Snapshot (preserved at order time) ===
+    product_name = Column(String(255), nullable=False)
+    product_sku = Column(String(100), nullable=True)
+    gtin = Column(String(50), nullable=True)  # EAN/UPC/ISBN etc.
+    gtin_type = Column(String(20), nullable=True)  # ean13, upc, isbn, etc.
 
+    # === Pricing ===
     quantity = Column(Integer, nullable=False)
     unit_price = Column(Float, nullable=False)
     total_price = Column(Float, nullable=False)
 
-    # Inventory tracking
+    # === External References (for marketplace items) ===
+    external_item_id = Column(String(100), nullable=True)  # e.g., Letzshop inventory unit ID
+    external_variant_id = Column(String(100), nullable=True)  # e.g., Letzshop variant ID
+
+    # === Item State (for marketplace confirmation flow) ===
+    # confirmed_available: item confirmed and available
+    # confirmed_unavailable: item confirmed but not available (declined)
+    item_state = Column(String(50), nullable=True)
+
+    # === Inventory Tracking ===
     inventory_reserved = Column(Boolean, default=False)
     inventory_fulfilled = Column(Boolean, default=False)
 
-    # Relationships
+    # === Relationships ===
     order = relationship("Order", back_populates="items")
     product = relationship("Product")
 
     def __repr__(self):
-        return f"<OrderItem(id={self.id}, order_id={self.order_id}, product_id={self.product_id})>"
+        return f"<OrderItem(id={self.id}, order_id={self.order_id}, product_id={self.product_id}, gtin='{self.gtin}')>"
+
+    @property
+    def is_confirmed(self) -> bool:
+        """Check if item has been confirmed (available or unavailable)."""
+        return self.item_state in ("confirmed_available", "confirmed_unavailable")
+
+    @property
+    def is_available(self) -> bool:
+        """Check if item is confirmed as available."""
+        return self.item_state == "confirmed_available"
+
+    @property
+    def is_declined(self) -> bool:
+        """Check if item was declined (unavailable)."""
+        return self.item_state == "confirmed_unavailable"