19. 1971 Plymouth Road Runner 426 Hemi
The 1971 Plymouth Road Runner 426 Hemi is a true unicorn in the muscle car world, with only a handful produced before emissions regulations took hold.
Its combination of raw power and cartoonish charisma has made it a collector favorite.
Auction prices for top-condition examples have soared past $400,000, reflecting growing appreciation for this rare and highly desirable Mopar legend in 2025.