Value is set as items as used or damaged. Not calculated on the fly.

src/engine/objects/CharacterItemManager.java

@@ -2358,7 +2358,9 @@ public class CharacterItemManager {
             if (!DbManager.ItemQueries.SET_DURABILITY(item, dur))
                 return;
             item.setCombat_health_current((short) dur);
-
+            item.value = (int) (item.template.item_value * (item.combat_health_current / item.template.combat_health_full));
+            if (!DbManager.ItemQueries.UPDATE_VALUE(item, item.value))
+                return;
         }
 
         if (this.absCharacter.getObjectType().equals(GameObjectType.PlayerCharacter) == false)

src/engine/objects/Item.java

@@ -52,7 +52,7 @@ public class Item extends AbstractWorldObject {
     public Enum.EquipSlotType equipSlot;
     private boolean canDestroy;
     private boolean isRandom = false;
-    private int value;
+    public int value;
     public OwnerType ownerType;
     public int templateID;
     private long dateToUpgrade;
@@ -781,6 +781,8 @@ public class Item extends AbstractWorldObject {
         if (this.chargesRemaining < 0)
             this.chargesRemaining = 0;
         DbManager.ItemQueries.UPDATE_REMAINING_CHARGES(this);
+        this.value = this.value * (this.chargesRemaining / this.template.item_initial_charges);
+        DbManager.ItemQueries.UPDATE_VALUE(this, this.value);
     }
 
     public void zeroItem() {