While this would definitely help the Market Wards, I think a lot of people still want an actual AH with a price history. Barring that, though, I think this would help alleviate things a bit. At the moment, I just check the prices for everything I want to sell before I go into the ward and write it all down. Then I can just put everything up while referring to my notes. A little obnoxious, but not game breaking.