FAQ 2.16 - Equipment Transfers
Equipment that is bound to a player or to an account may be temporarily unbound so that it can be sold to another player. Before the other player can use it, the item must be rebound to that player or, if the item was an account bind item, to the player's account. If you have an extremely powerful item that you wish to sell, you may be able to unbind it with the 'credit buy unbind' command. Not all items can be unbound.