Blizzard has revealed that it is adding auction houses to World of Warcraft. The cities of Stormwind, Ironforge, Darnassus, Ogrimmar, Thunderbluff and Undercity will get these auction houses, which allow faction specific trades (Alliance trades with Alliance, Horde trades with Horde). Sellers can set a minimum price for whatever they are selling, and items won will be delivered through a new in-game mail system. Additionally an auction house in Booty Bay will allow for different factions to trade with each other.