Auction house currency

It would be nice if we were able to sell adena, gift coin, and doll coin on the AH. Keep the current system but just add in being able to sell the different currency. Would probably have to add in a box to manually type in the amount of adena you want to sell. Other than that it would work exactly like it does now, someone could sell 10 gc for 15 gc but the free market always ends up better ^^.