Please add advanced filters/search to the auction house. A few good ones to start out with are:
1) Rare, Epic, Etc. ---- Quality/Grade of the item on auction.
2) Gear, Item, Card, Material, Etc.
3) Artisan, Chef, Blacksmith, Alchemist, sorted by profession.
4) Sorc, Priest, Knight, Rogue, Etc, sorted by class.
Please make the auction house search a little more refined. So that it is easier to find what were looking for ingame. Instead of extensively searching for a item that is difficult to be found.