what to do if you have the "lost" car

So what is the guys story? What was his reson for having to sell and why does he just now have the money to buy it back? If you, or your cousin, have no sentimental attachment to the car, then work him a deal and move on to the next car. With that being said then i would be looking at how much the value of the car is if the original owner were selling it, and work a price from there.If you guys put alot of work into the car that you wont recoup money on, let the fella know that and maybe he'll make you whole on it and you can use the experiance on the next car. OR, just tell him sorry not for sale and go on about life.