I just don't see any need for a middle man. I like to deal direct. I don't see any need for a middle man to hold the money either.
Real estate? Escrow? Sure.
But a bike? You put the money in my hand, and I put the title in yours.
Or vice versa if I am buying.
I'm all in favor of fly n buy n ride it home. If it's the right bike. Call up the owner and see what it sounds like. Get someone in the area to look at it for you. Then go.