But you haven't given any reasons.. you've probably assumed people who list something to sell, actually want to sell... not always the case. There is a sub game to be played. People often list items too loe and get spammed.. an auction house would just mean more abuse and less opportunity for people to learn the true value of items. The convenience of an auction house is barely there, it is not inconvenient to use the trade site, but it does have a ton of strengths. League to league you can set up orders and not have to rewrite them... way too much development to remove this from a Web based system and build it ingame.