I don't know if this has been suggested, but I think I more clear warning about your inventory being full in regards to auctions is necessary, or at least having your money be refunded when the item is destroyed. I didn't realise my inventory was full and just threw away 39 or so PC essentially, and this feature isn't particularly made very obvious anywhere. It would be helpful if on auctions there was at least some sort of bar warning you that your inventory is full.