Currently the item overflow is quite disturbing, i've been thinking that a possibility to could be to limit the times an item can be sold in the gold auctions house.
here would be an example :
we limit the times of sells to 1
an item X is put in the AH and bought, the new possessor of this item would only have the choices to trade, transform into mats oder put it in the RMAH.
als long an item isn't sold you can put it as many times as you want in the AH
i would like to know what you think about this idea, improvements and if quite a few people find it okay i would put it in the US and EU forums ob D3 blizz