i think you can't do enough with currants, you can buy a lot items with them, but not so much things to improve yourself, your looks or your house. So to make currants a bit more useful for 'fun' things, they should add 'Clothing' in the auction house.
Set a minimum price for selling the membership items, like 20.000 currants each. So there is still a value of becoming a member.
What do you think?