Let me give u example if 1 ID already has assassin gambler artisan apos IW and Demol how do u want to make SM or if somehow u have real char apostle for example and u want to raise ur other char easily with apos u need 2 ID and if the suitable eauipment in apos how u wanna trade it? It will be inefficient right? Locking item is not the solution to this RMT inflation