In the gold-based auction house, a flat fee of 15 percent will be taken from the final sale price of an auction. The real-money auction house fees will be $1 USD, €1, 1£, etc. from equipment (weapons and armor) and 15 percent from crafting materials. There is an additional 15 percent "cashing-out" fee. Proceeds gained from selling items in the real-money auction house.
Well Diablo 3, which features elements of the hack and slash and dungeon crawl genres is now coming out with a co-op mode that allows players to play cooperatively. It features a RWT auction house(blizzard finally gave into those gold farmers) and regular in-game auction house. Later, the game will come out with pvp but blizzard said that the pvp wasn't up to blizzards standards.