Sounds like someone other than you is getting scammed here.... because the way you are laying this out, your posts have a tone to them that sounds like....
"I made it impossible for them to trace this back to me, do I need to worry about getting caught?"
If you didn't sell the item then pay the money back, you didn't win the lottery here.
You still have ownership of the sites... there is no legit reason in the world to keep the money... just because you spent the money you got doesn't mean you are off the hook to pay it back. Consider it an interest free loan.... if you don't pay it back though when they do catch up to you, you will have penalties and other fees to pay as a result of your deception.