13. Alfa Romeo 8C 2900B
The Alfa Romeo 8C 2900B is one of the most coveted prewar classics ever built, with only a handful of examples crafted in the late 1930s. Its breathtaking design and advanced engineering have made it a legend in the collector world. Auction prices for these rare beauties have soared past $19 million, reflecting their unmatched allure and historical significance. [Source]