1968 Buick LeSabre 

Avg. Used Price: $3,400 - $7,400 Often overshadowed by the Chevy Impala, the Buick LeSabre offers unique and appealing styling with a comfortable interior. Its 1968 model year received updated styling and is expected to increase in value soon.

1984 Buick Regal Grand National 

Avg. Used Price: $8,000 - $12,000 The Grand National's GN Package offered impressive performance with its V6 engine, but it never gained the recognition it deserved, especially compared to the popular GNX variant.

1967 AMC Rebel 

Avg. Used Price: $6,000 - $9,000 Despite being a muscle car with promising specs and convertible option, the AMC Rebel was overlooked, possibly due to AMC's overall mediocre performance in the industry.

1980 AMC Eagle 

Avg. Used Price: $5,000 - $12,000 The revolutionary AMC Eagle, the first production car with permanent all-wheel-drive, is often underestimated despite its significant historical value as the first crossover vehicle.

1962 Pontiac Grand Prix 

Avg. Used Price: $13,000 - $18,000 The first-generation Grand Prix, designed by John DeLorean, offered impressive power output and sleek looks. However, it remains overlooked by many collectors.

1964 Mercury Marauder

Avg. Used Price: $7,700 - $10,400 Originally a trim level on various Mercury models, the Marauder stood out with its sporty accents, powerful engines, and luxurious cabin, making it a sleeper car with impeccable style.

1970 Oldsmobile Vista Cruiser 

Avg. Used Price: $10,000 - $17,000 With a powerful V8 engine, the Vista Cruiser was a station wagon powerhouse of the '70s, but it couldn't keep up with market dynamics and is now a forgotten gem.

1962 Ford Galaxie 500 

Avg. Used Price: $5,000 - $6,800 The Ford Galaxie was a symbol of the early '60s rock 'n' roll era, but as the market shifted, it lost popularity and never regained the same love it once had.

1967 Ford Thunderbird 

Avg. Used Price: $5,700 - $9,800 Once a symbol of American luxury and style, the Thunderbird lost momentum over the years and is now mostly seen as an ordinary vehicle despite its larger size and powerful engines.