I need help coming up with a fair price to offer for a allis chalmers 7030. First it has not ran for at least 4 years, he said he parked it where it sits. Second, the three point does not lift. Third, rear tires are 30% tread with a large gash on one but both hold air. The front two one is perfect and the other needs to be replaced. Fourth, the cab has no glass what so ever and missing the doors. Fifth, the power steering hydraulic arm leaks. The body is straight, missing the muffler. The tractor has also been sitting outside uncovered for the entire four years in Pennsylvania's climate. Hes asking $4200 it seems like a fair price but it needs a lot of work what would be a reasonable counter offer?