Bukkit

What steps will reproduce the problem?
1. Buy an enchant on an item
2. Use the item to 1 durability
3. Sell the enchant.

What is the expected output? What do you see instead?
I expected the stock to reduce if I am using an enchant. Instead the stock continues to increase making enchants very cheep and re-useable.

What version of the product are you using?
current

Do you have an error log of what happened?
no error

Please provide any additional information below.
Make it to where you cant sell enchant on items with less than 100% durability.