Car - please quote a price for an original 1982 Lincoln continental 20,000 miles mark v1 4 door mint

Not a penny over 3500 dollars. Car that has set that long is going to have seal problems and will probably need a complete engine overhaul, brakes, tires, electrical systems checked. A complete check. No doubt it might look mint but 20000 miles and not driven. There are going to be problems a little later down the road. In fact, 3500 might be too steep; considering the extra maintenance costs you are going to have to digest soon; should you purchase it.