I have a 1989 300zx 2+2 coupe, t-top. The transmission died and it does not run and the air conditioning doesnt work. The body is in excellent condition. It has a quarter of a million miles on it. I tried kelly blue book but it cant determine a value for a car that doesnt run. Someone offered 300 for it but I think hes trying to nickel-and-dime me. Can ne one help me out?