The Lamborghini Gallardo is the perfect “entry-level” Lamborghini if you’re in the process of buying your first exotic car. O. Summary of Convertible Classic Cars Specs, History and Autos for Sale. 3000 6 Cylinder 1966 Austin Healey 3000 Convertible 6 Cylinder 4 Speed Manual for sale at $52,000.00. Eldorado Biarritz 1956 Cadillac Eldorado Biarritz Convertible 365 CID V8 305 HP 3 Speed Automatic for sale at $149,000.00. Browse Classified Ads…