I came across a low mile (55k) all original 1970 cadillac eldorado. It has a 400hp 550tq 8.4 ltr 500cu stock cadillac engine. I was really surprised by the factory power numbers, figure it might make a nice weekend cruiser. I have no idea what to offer since I can only find a couple for sale on ebay with no bids and some with high for sale prices. Does anyone know what these actually sell for?