I've already posted multiple times an idea for the MW that incorporates all the good stuff about an AH (time and convenience) without implementing the shitty stuff (Timed Bidding, Blind Bidding, and Price History).

1. Remove the Physical Wards.
2. Make the Wards a Menu
3. When you search for an item it does like it does now and lists the retainer of the user with the lowest price first.
4. Clicking the retainer opens their inventory in a new menu and lets you buy the item you were searching for, It also keeps the "Window Shopping" Effect.
5. You can blind search the lists of retainers still.
6. When you buy an item its delivered to a mailbox. Go pick it up.