As Chuck said it was a classy move to buy it back.
If your friend was the editor of Petrolicious.com he certainly did not pay much attention to the content lol. 20 years back I sold a car to a neighbor, apparently I missed the part of the deal where I warranted it. I ended up fixing things on it in my driveway for him over the next two years before I moved, maybe I was a schmuck or too nice of a guy but I didn't want bad blood between us. Good luck on selling it again Tom...........