This was posted on WoWInterface too, I just copy-pasted it.
I'd like to know if there's an addon that can record all the items I have and then tells me which one can be sold at the AH with a good profit. This info could be retrieved from Auctioneer, for example. Basically, it would list the items in a table and then sort it by competition above market, undercutting and so on, telling where the item can be found too (pretty much like Altoholic does).
This would be very useful specially when you have tons of items spreaded throughout tons of alts and you really wish to get rid of tons of crap.