Mercedes-Benz 300SL Gullwing

Its distinctive gullwing doors weren't a stylistic flourish but a necessity imposed by the tubular space frame chassis, which had tall side sills for rigidity. Mercedes built only 1,400 coupes and 1,858 roadsters. Today, a well-preserved Gullwing commands $1-2 million, reflecting its status as the crown jewel of any serious collection. The 300SL's top speed of 161 mph set a benchmark that would not be surpassed for nearly a decade, and its fuel injection system alone cost $300 per unit in 1954—proving that Mercedes didn't just create a car; it birthed a sports car legend.