"Selling for a friend"...makes me hesitant. This guy can claim he knows nothing if you ask a question, liiike "this car has a 98-00 front end, why is it advertised as a 2001?". "**** I don't know!"
I would never buy a modified car in the first place, unless I knew the person that worked on it and they'd be around to help me with any problems that came up, OR if it was by some reknowned shop. I'd stay away. Take the extra money you would've spent buying this car over a stock one, and build it yourself.