This is working scam got already one and getting more. I cant prove since i dont have enough rep but oh well.
Anyways you dont need anything to do this.
First go to armory and find nice character such as level 70 with t6 or something.
Then go to markeedragon or similiar place and make account. Now just post WTT "your class here" and then give made up info such like: he has over 2k gold, 20k honor or something like that and put your msn address there. Now when they contact just start asking like normal questions like how much gold and such so you would look like real buyer. Then you say something similiar: I have traded him twice already but they always retrieve the password so can we change all the information?
If he says yes move on. If he says no then block him. Now tell him good way to change the information without risk of getting scammed. You will say SQA first then he says it, Then he changes the email to your email then you do it, then you say account username then he says it, then he says pass then you say it. Just give the incorrect information and when your supposed to change the email just wait few minutes. You should also put the password retrieve ready so when you get the username just retrieve the account then its yours.
And thats how you get legit account without fear of someone retrieving the password.