I bought a lot and that was a general statement, but rule number 1 for me is:
If I do not know the seller and he/she is not from US or UK I assume fraud and have to prove to myself otherwise. Same thing was with this guy I assumed fraud that's why I never bought them. I tested them first, but the bastard stole my test money.
I have never bought a scammed domain in any way so far, but I come across them a lot. I waste testing money, time and the overall experience brings nothing positive. I'm don't want to be a detective.
I know few domains I buy from and they are all over, but that's a different story.
BTW, how do you edit this thread? My spelling above wasn't that great.