Ripped me off on a trade. Kept insisting I go first which I would have normally done anyway without mention, but he seemed fishy because of his insisting and concern with me going first. I ended up going taking half payment, then trading him. As soon as I traded him, he was gone from friends and ignoring me completely. :(
Made a deal with me to pay part first, after he paid part I gave him the game, he then immediately removed me from friends and disappeared...
He insisted that I go first. Then, he gave me the key for a soon-to-be F2P game instead of the one I wanted. I didn't know it was going to be F2P and considered it an honest mistake. Now, he went back and deleted his original offer. Now that I know the game is going F2P, I know that it was a scam from the beginning. And it was this Steam profile - no issue of impersonation.