10. 1949 Aston Martin DB1
Known originally as the “2-Liter Sports,” the DB1 was Aston Martin’s first postwar sports car and predecessor to the iconic DB2. Just 15 were built between 1948 and 1950, each powered by a 2.0-liter Claude Hill engine with 90 hp. Even a well-weathered, cobweb-covered DB1 once drew a $600,000–$1 million estimate at auction; in good condition, they can exceed $2 million.