9. 1971 Plymouth GTX 440 Six Barrel
The 1971 Plymouth GTX 440 Six Barrel marks the end of an era for high-performance Mopars.
Equipped with the triple-carburetor Six Barrel setup, these cars are exceptionally rare, with only a handful surviving in original condition.
Recent sales have seen fully documented examples fetch $150,000 to $200,000.
The GTX’s combination of brute force and scarcity ensures its collector status—and rising value—well into 2025.