20. 1934 Bugatti T59 Sports
Bugatti built his name on the world’s race tracks before conquering the luxury market. That’s why racing models are always a bit more sought-after than sedans or coupes.

This particular one has a stellar racing history, original condition, and some documented light restoration. Knowing all of that, the selling price of over $13 million shouldn’t be surprising as a result (via Sports Car Market).