I have a 1976 Cadillac Eldorado Crystal Blue convertible. It has never been titled and less than 400 miles. I have the manufacturer certification of origination. My family owned a dealership for many decades and they sold it in the 80’s. It sat in a building for over 40 years. I’m not sure what it is worth. It has a new car smell but I have to replace the top because it was brittle.