Just as a FYI be sure to look at your mail when you get it. People will send you a request for money after you put an item in the AH. The money request will be the same as your item so it looks as if you just got your money back. If you click on the mail button then you give them the money rather than money getting back to you.
If this is somewhere else I apologize, just trying to warn the people that don't understand Korean.
Edit: Thanks to Sabin here is what I am talking about.
Real action house mail(on the left), as you can see , the words are purple
fake mail(on the right)