Theres a 1999 mustang with 120,000 miles on it. its a very nice and clean mustang. The guy is letting it go to me for 2000 cause i know him but he has a 3500 for sale sign on it. I really wanna buy it but it has a broken head gasket. Ive heard its a real hassle cause its ford. Is it worth it or should i just go elsewhere?