The amount was small but apparently this guy has done this to others. He makes deals for multiple domains and then just completes the publically posted deal. He then reneges of the other deals and threatens to post negative feedback for those that complain. What got me pissed off is that he posted in this thread and complained that did not respond to him fast enough so he claimed he was worried about me screwing him.
I only discovered the payment address issue after he did this to me. I have contacted the real estate agent selling the property he is using as his payment address. Let's see if he heard of this guy.