diff --git a/apps/openmw/mwclass/armor.cpp b/apps/openmw/mwclass/armor.cpp
index a7a459382..b29bf36b2 100644
--- a/apps/openmw/mwclass/armor.cpp
+++ b/apps/openmw/mwclass/armor.cpp
@@ -168,7 +168,7 @@ namespace MWClass
         MWWorld::LiveCellRef<ESM::Armor> *ref =
             ptr.get<ESM::Armor>();
 
-        return ref->mBase->mData.mValue * (static_cast<float>(getItemHealth(ptr)) / getItemMaxHealth(ptr));
+        return ref->mBase->mData.mValue;
     }
 
     void Armor::registerSelf()
diff --git a/apps/openmw/mwclass/lockpick.cpp b/apps/openmw/mwclass/lockpick.cpp
index 5d91db9e2..bc6855129 100644
--- a/apps/openmw/mwclass/lockpick.cpp
+++ b/apps/openmw/mwclass/lockpick.cpp
@@ -86,7 +86,7 @@ namespace MWClass
         MWWorld::LiveCellRef<ESM::Lockpick> *ref =
             ptr.get<ESM::Lockpick>();
 
-        return ref->mBase->mData.mValue * (static_cast<float>(getItemHealth(ptr)) / getItemMaxHealth(ptr));
+        return ref->mBase->mData.mValue;
     }
 
     void Lockpick::registerSelf()
diff --git a/apps/openmw/mwclass/probe.cpp b/apps/openmw/mwclass/probe.cpp
index 5db0d7a79..ed8625eec 100644
--- a/apps/openmw/mwclass/probe.cpp
+++ b/apps/openmw/mwclass/probe.cpp
@@ -85,7 +85,7 @@ namespace MWClass
         MWWorld::LiveCellRef<ESM::Probe> *ref =
             ptr.get<ESM::Probe>();
 
-        return ref->mBase->mData.mValue * (static_cast<float>(getItemHealth(ptr)) / getItemMaxHealth(ptr));
+        return ref->mBase->mData.mValue;
     }
 
     void Probe::registerSelf()
diff --git a/apps/openmw/mwclass/repair.cpp b/apps/openmw/mwclass/repair.cpp
index f8b72be37..d7a080534 100644
--- a/apps/openmw/mwclass/repair.cpp
+++ b/apps/openmw/mwclass/repair.cpp
@@ -76,7 +76,7 @@ namespace MWClass
         MWWorld::LiveCellRef<ESM::Repair> *ref =
             ptr.get<ESM::Repair>();
 
-        return ref->mBase->mData.mValue * (static_cast<float>(getItemHealth(ptr)) / getItemMaxHealth(ptr));
+        return ref->mBase->mData.mValue;
     }
 
     void Repair::registerSelf()
diff --git a/apps/openmw/mwclass/weapon.cpp b/apps/openmw/mwclass/weapon.cpp
index 98b02b914..66affa599 100644
--- a/apps/openmw/mwclass/weapon.cpp
+++ b/apps/openmw/mwclass/weapon.cpp
@@ -154,7 +154,7 @@ namespace MWClass
         MWWorld::LiveCellRef<ESM::Weapon> *ref =
             ptr.get<ESM::Weapon>();
 
-        return ref->mBase->mData.mValue * (static_cast<float>(getItemHealth(ptr)) / getItemMaxHealth(ptr));
+        return ref->mBase->mData.mValue;
     }
 
     void Weapon::registerSelf()
diff --git a/apps/openmw/mwgui/tradewindow.cpp b/apps/openmw/mwgui/tradewindow.cpp
index 7ef472282..c0a51311f 100644
--- a/apps/openmw/mwgui/tradewindow.cpp
+++ b/apps/openmw/mwgui/tradewindow.cpp
@@ -23,6 +23,19 @@
 #include "countdialog.hpp"
 #include "dialogue.hpp"
 
+namespace
+{
+
+    int getEffectiveValue (MWWorld::Ptr item, int count)
+    {
+        int price = item.getClass().getValue(item) * count;
+        if (item.getClass().hasItemHealth(item))
+            price *= (static_cast<float>(item.getClass().getItemHealth(item)) / item.getClass().getItemMaxHealth(item));
+        return price;
+    }
+
+}
+
 namespace MWGui
 {
     const float TradeWindow::sBalanceChangeInitialPause = 0.5;
@@ -465,7 +478,7 @@ namespace MWGui
 
     void TradeWindow::sellToNpc(const MWWorld::Ptr& item, int count, bool boughtItem)
     {
-        int diff = MWBase::Environment::get().getMechanicsManager()->getBarterOffer(mPtr, item.getClass().getValue(item) * count, boughtItem);
+        int diff = MWBase::Environment::get().getMechanicsManager()->getBarterOffer(mPtr, getEffectiveValue(item, count), boughtItem);
 
         mCurrentBalance += diff;
         mCurrentMerchantOffer += diff;
@@ -475,7 +488,7 @@ namespace MWGui
 
     void TradeWindow::buyFromNpc(const MWWorld::Ptr& item, int count, bool soldItem)
     {
-        int diff = MWBase::Environment::get().getMechanicsManager()->getBarterOffer(mPtr, item.getClass().getValue(item) * count, !soldItem);
+        int diff = MWBase::Environment::get().getMechanicsManager()->getBarterOffer(mPtr, getEffectiveValue(item, count), !soldItem);
 
         mCurrentBalance -= diff;
         mCurrentMerchantOffer -= diff;