I've never met the guy, but I did buy a couple game from him and he lives next door, and is married to my grandmother, so I can't speak from experience but hear the guy's always backing out of deals with that guy. I even heard he once drove all night just to get someplace different from where he left, only to end up back home, almost as if it were a round trip. What's the point?!?
Proceed with caution is all I can say and if you hear rumors, they aren't unfounded, only cautiously ahead of any fact or concrete evidence.
I recommend that Cosmokramer come out and respond to Cosmokramer's claims directly so we can all see both sides of this clearly defensible arguably offensive action by the guy. At least then the mods can close the thread and we can move on.