I really want this feature although I don't know how hard it will be to implement.
Suppose you want to sell your 5* item that is already bound to you and you don't have enough CE to unbind( Not everyone have 4k CE on them ).
You either have to save up(it can take a lot), offer collaterals or borrow it from friends. It is really bothersome.
What I offer is just to put an unbind option.
Example: In the trade window. you put your BOUND 5* item ( only 1 bound item maybe put in 1 transaction ). The potential buyer then have to give AT LEAST 4k CE for the trade to be valid. Then after both sides press OK. The item is unbound and is in possession of the buyer and 4kCE will be used up as an unbind fee.
What do you think?
PS: Potential side effects can be, that the prices of items can drop by a lot. Since selling items will become much easier.
Sounds like a reasonable concept.