25. 1937 Bugatti T57 S Atalante
As one of the finest pre-war brands, Bugatti is always fetching high prices at auctions. But the 57S Atalante is a true collector’s dream. It’s a gorgeous coupe powered by a straight-eight engine with a beautiful coupe body.

This one sold for over $8.5 million and it could fetch a bit more if sold again. The wealthy customers held Bugatti’s exclusivity, performance, and unique engineering aspect in high regard, hence the extreme prices (via Supercars).