eBay Classifieds offers a large number of ads tailored to classics cars and helps make searching on the internet for classic car ads in St. Louis convenient and practical. Perhaps you are a great fan of westerns and you want to buy a car that matches your personality. Maybe you are looking for a specific make that is difficult to find elsewhere in your local area or on the internet. You might be buying a classic car as a present for a special event. These ads may include classic cars such as Mercedes Benz, Ford Thunderbirds, Ford Mustangs and Cadillac cars, among others.