There's no risks mate it's illegal selling accounts, you might be thinking, well du'h the polices wont give a fword about Blizzards rules, you might be right but the thing is they wont care about some guy whining to them that he got his World of Warcraft Account scammed [Sarcasm="100"]just watch out so you don't scam your king/president, then you might end up in trouble[/Sarcasm]
Also Blizzard wont care much either, they might lock the scammed account but that doesn't get you in any trouble either. I guess what I'm trying to say it: Don't worry about the Blizzard, Police or FBI etc etc. No one cares about a scammed account. Just don't screw people on alot of real life cash and your good.
Have fun scamming mate!