I bought Kevgascan's BBH back in Nov 2014. It was in absolutely beautiful condition. I did not get the vibe he was any kind of scammer or thief at all. Of course, that may change when you go "cash only," as I took cash and one of my friends as I do with nearly any transaction where I do not know the individual I am doing business with.
I hope Kevin can come explain this situation. He did seem like a genuinely good person, and while I do side with the OP as of now, I am keeping an open mind until I hear Kevin's side. I sure hope he didn't "go rogue" on the community. Seemed like a very straight-forward guy.
I am sorry for what you are going through, OP. Definitely not a cool thing to have to go through, and I hope for a quick and speedy resolution for you.