Banned - posting as Toonvendor - http://www.epicnpc.com/wow-euro-accounts-auctions-buy-sell/480654-*removed*.html
I've seen it done many different ways, one including you have the person put a couple random items in the AH and put them for the gold ammount, they buy it and you're done.. but alot of people do use the guild thing and it works pretty well =)
Just nothing to where blizzard can trade it, such as face-to-face and mail.