I bought a steam account from Konamacona about 7 months ago. The thread is here:Steam Account with 80 Games + POP!
Everything was good for a while, but then suddenly I couldn't log in and I couldn't look my profile up on Steam. In other words, my account had been recovered.
So I quickly contacted Konamacona by PM. After explaining what happened in a non-accusatory way, he claimed that his e-mail had been hacked and thus it wasn't him who had recovered the account. He did agree that this was probably what had happened.
Here is a pic of the account: http://i41.tinypic.com/2mxgab7.jpg
And a POP used to sell it: http://i40.tinypic.com/2zoyypl.png
I realize I don't have direct proof he scammed me, but even if it was what he said and a hacked e-mail, then it was still negligence and stupidity. Which he admitted to over PM.