diff --git a/apps/openmw/mwgui/container.cpp b/apps/openmw/mwgui/container.cpp
index 6f8ca4730..9ff4b8d4a 100644
--- a/apps/openmw/mwgui/container.cpp
+++ b/apps/openmw/mwgui/container.cpp
@@ -309,11 +309,14 @@ void ContainerBase::drawItems()
         }
     }
 
+    std::vector<MWWorld::Ptr> ignoreItems = itemsToIgnore();
+
     // now add the regular items
     std::vector<MWWorld::Ptr> regularItems;
     for (MWWorld::ContainerStoreIterator iter (containerStore.begin(categories)); iter!=containerStore.end(); ++iter)
     {
-        if (std::find(equippedItems.begin(), equippedItems.end(), *iter) == equippedItems.end())
+        if (std::find(equippedItems.begin(), equippedItems.end(), *iter) == equippedItems.end()
+            && std::find(ignoreItems.begin(), ignoreItems.end(), *iter) == ignoreItems.end())
             regularItems.push_back(*iter);
     }
 
diff --git a/apps/openmw/mwgui/container.hpp b/apps/openmw/mwgui/container.hpp
index 956382f23..563b22bc3 100644
--- a/apps/openmw/mwgui/container.hpp
+++ b/apps/openmw/mwgui/container.hpp
@@ -94,13 +94,12 @@ namespace MWGui
 
         std::string getCountString(const int count);
 
-        // to be reimplemented by InventoryWindow
         virtual bool isInventory() { return false; }
         virtual std::vector<MWWorld::Ptr> getEquippedItems() { return std::vector<MWWorld::Ptr>(); }
         virtual void _unequipItem(MWWorld::Ptr item) { ; }
 
-        // to be reimplemented by TradeWindow
         virtual bool ignoreEquippedItems() { return false; }
+        virtual std::vector<MWWorld::Ptr> itemsToIgnore() { return std::vector<MWWorld::Ptr>(); }
     };
 
     class ContainerWindow : public ContainerBase, public WindowBase
diff --git a/apps/openmw/mwgui/tradewindow.cpp b/apps/openmw/mwgui/tradewindow.cpp
index 97c66b9dc..e5fc47764 100644
--- a/apps/openmw/mwgui/tradewindow.cpp
+++ b/apps/openmw/mwgui/tradewindow.cpp
@@ -197,8 +197,6 @@ namespace MWGui
 
     std::vector<MWWorld::Ptr> TradeWindow::getEquippedItems()
     {
-        
-
         std::vector<MWWorld::Ptr> items;
 
         if (mContainer.getTypeName() == typeid(ESM::Creature).name())
@@ -220,4 +218,61 @@ namespace MWGui
 
         return items;
     }
+
+    bool TradeWindow::npcAcceptsItem(MWWorld::Ptr item)
+    {
+        int services = 0;
+        if (mContainer.getTypeName() == typeid(ESM::NPC).name())
+        {
+            ESMS::LiveCellRef<ESM::NPC, MWWorld::RefData>* ref = mContainer.get<ESM::NPC>();
+            if (ref->base->hasAI)
+                services = ref->base->AI.services;
+        }
+        else if (mContainer.getTypeName() == typeid(ESM::Creature).name())
+        {
+            ESMS::LiveCellRef<ESM::Creature, MWWorld::RefData>* ref = mContainer.get<ESM::Creature>();
+            if (ref->base->hasAI)
+                services = ref->base->AI.services;
+        }
+
+        if      (item.getTypeName() == typeid(ESM::Weapon).name())
+            return services & ESM::NPC::Weapon;
+        else if (item.getTypeName() == typeid(ESM::Armor).name())
+            return services & ESM::NPC::Armor;
+        else if (item.getTypeName() == typeid(ESM::Clothing).name())
+            return services & ESM::NPC::Clothing;
+        else if (item.getTypeName() == typeid(ESM::Book).name())
+            return services & ESM::NPC::Books;
+        else if (item.getTypeName() == typeid(ESM::Ingredient).name())
+            return services & ESM::NPC::Ingredients;
+        else if (item.getTypeName() == typeid(ESM::Tool).name())
+            return services & ESM::NPC::Picks;
+        else if (item.getTypeName() == typeid(ESM::Probe).name())
+            return services & ESM::NPC::Probes;
+        else if (item.getTypeName() == typeid(ESM::Light).name())
+            return services & ESM::NPC::Lights;
+        else if (item.getTypeName() == typeid(ESM::Apparatus).name())
+            return services & ESM::NPC::Apparatus;
+        else if (item.getTypeName() == typeid(ESM::Repair).name())
+            return services & ESM::NPC::RepairItem;
+        else if (item.getTypeName() == typeid(ESM::Miscellaneous).name())
+            return services & ESM::NPC::Misc;
+
+        return false;
+    }
+
+    std::vector<MWWorld::Ptr> TradeWindow::itemsToIgnore()
+    {
+        std::vector<MWWorld::Ptr> items;
+        MWWorld::InventoryStore& invStore = static_cast<MWWorld::InventoryStore&>(MWWorld::Class::get(mContainer).getContainerStore(mContainer));
+
+        for (MWWorld::ContainerStoreIterator it = invStore.begin();
+                it != invStore.end(); ++it)
+        {
+            if (!npcAcceptsItem(*it))
+                items.push_back(*it);
+        }
+
+        return items;
+    }
 }
diff --git a/apps/openmw/mwgui/tradewindow.hpp b/apps/openmw/mwgui/tradewindow.hpp
index dd28fcb8b..5e762cbe5 100644
--- a/apps/openmw/mwgui/tradewindow.hpp
+++ b/apps/openmw/mwgui/tradewindow.hpp
@@ -30,6 +30,8 @@ namespace MWGui
             //virtual void Update();
             //virtual void notifyContentChanged();
 
+            bool npcAcceptsItem(MWWorld::Ptr item);
+
         protected:
             MyGUI::Button* mFilterAll;
             MyGUI::Button* mFilterWeapon;
@@ -61,6 +63,8 @@ namespace MWGui
             virtual bool ignoreEquippedItems() { return true; }
             virtual std::vector<MWWorld::Ptr> getEquippedItems();
 
+            virtual std::vector<MWWorld::Ptr> itemsToIgnore();
+
             void updateLabels();
     };
 }