How about add some vanity drop ?
The vanity from store ofcourse untradeable even we bought it with gold, and the item that we can put in auction house only weapon and gem which is cheap i think because the easiest game to farm gold is dark legends , both pocket legends and star legends is hard to get gold/credit but both have vanities that price over million. The game is already awesome, i just want to say my opinion. Thanks for a great job to make this cool game.