Update needed here for inventory

src/engine/net/client/handlers/BuyFromNPCMsgHandler.java

@@ -192,8 +192,10 @@ public class BuyFromNPCMsgHandler extends AbstractClientMsgHandler {
                     return true;
                 }
 
-                if (vendorItem != null)
+                if (vendorItem != null) {
                     itemMan.buyFromNPC(vendorItem, npc);
+                    itemMan.updateInventory();
+                }
                 return true;
             } catch (Exception e) {
                 Logger.error(e);