Saw a 1985 500sel for sale by orig owner and older man spoke on phone.Has 150k new exhaust new tires paint not bad slightly peeling on top ,2 front windows dont open ac dont work said worked last year and just needs charge.he wants 3500 neg.whats your opinion on this car fair book value is 2300 good is 2600 kbb value. i want to offer him 1500 or 2k what is the problems with this car is the engine strong would prefer dissel but havent seen any good ones what about the tranny does it hold up they are my 2 biggest concerns love the way this car looks