Please re-read all the stuff you haven't read.
1. Auction House is only an Auction House if it has Blind or Timed Bidding.
2. All Time based Conveniences that the Market Wards lack that "Auction Houses" have can be implemented into the Market Wards without ever mentioning or using an Auction or Auction House.
3. One of the Benefits of an Market Ward over an Auction House is Impulse Buying. Most people do not impulse buy on Auction Houses, they find what they want and leave. With the ward system you can potentially introduce characters to new items they didn't know about or knew about and would want but never considered buying at the time. Or sell things in sets so that when a person searches for one part of the set they can find and buy the other parts directly from you. This is not something you can do with an AH. Each item has to be searched for individually.