Hey Dan, I checked the carfax on your car. I see no transfer of ownership past the salvage title to Geico insurance in 2003. The accident actually occurred in April 2002. According to the DMV, the car didn't belong to this guy for him to sell it to you. He never transferred ownership of the vehicle. In the state of Nevada, this would have been an illegal sale.
I really don't think it's a good idea to sell this vehicle. You need to put that snake oil salesman in jail.... and I don't know about MD, but in Nevada....... he would go to jail from what I can see. He can NOT get you a clear title. This car will never have a clear title again. A rebuilt title is all it can have, and $5,600 is a little steep for a car reported as having "frame damage" on it's carfax.