I saw an ad in the local paper for a 1979 280. Its an automatic, with all the power options, black, over 100K. Its been sitting for 2 years, but runs and drives. It has some nice wheels. see attached.

Your best bet is to have the car inspected by a local shop to see the EXACT condition of all systems on the car. Sitting for two years does no good at all for the condition of the car.

www.nadaguides.com/ can give you an idea of the worth of such a car.