Not every collectible car began life as a future classic. During the 1960s, many buyers simply wanted reliable transportation or an affordable way to enjoy the open road. Some of those overlooked models quietly disappeared over the years, while others gained loyal followings that steadily pushed values higher. Today, these once-underappreciated cars have become sought-after collectibles, proving that rarity, character, and lasting appeal can sometimes matter more than original reputation.1963 Buick RivieraWhen the Buick Riviera debuted, it impressed buyers with its clean styling and refined grand touring personality. It offered powerful V8 engines, a luxurious interior, and elegant design without relying on excessive chrome. While it never matched the sales numbers of some rivals, collectors have come to appreciate its timeless appearance and excellent road manners. Today, early Rivieras are among the most desirable American personal luxury cars.1964 Studebaker AvantiThe Studebaker Avanti arrived with futuristic styling, a fiberglass body, and available supercharged V8 performance. Unfortunately, Studebaker’s financial troubles limited its success when new. As the years passed, enthusiasts began to recognize the Avanti as one of the boldest American designs of the decade. Its limited production and unique engineering have turned it into a highly respected collector car.1965 Chevrolet Corvair CorsaThe Chevrolet Corvair Corsa offered something few American cars could match: a rear-mounted, air-cooled engine and responsive handling. Although controversy overshadowed the Corvair during its production years, enthusiasts have since rediscovered its innovative engineering and enjoyable driving experience. Clean Corsa models are becoming increasingly difficult to find, making them one of the biggest surprise collectibles from the 1960s.1966 Oldsmobile ToronadoThe Oldsmobile Toronado broke new ground with its front-wheel-drive layout and striking styling. It combined advanced engineering with effortless V8 performance, creating one of the most innovative American cars of its era. For many years it remained an affordable classic, but growing appreciation for its originality and historical importance has steadily increased collector interest.1967 Mercury Cougar XR-7The Mercury Cougar XR-7 offered a more refined alternative to the Ford Mustang, combining sporty styling with upscale comfort. Hidden headlights, woodgrain interior trim, and available V8 engines helped it stand apart from its pony car rivals. Once overshadowed by the Mustang, the Cougar has gained recognition among collectors who appreciate its unique personality and elegant design.1968 AMC AMXThe AMC AMX proved that American Motors could build a genuine performance car with style and character. Its short wheelbase, two-seat layout, and available V8 engines created a driving experience unlike most American muscle cars. Limited production has helped make surviving examples increasingly desirable, and collectors now recognize the AMX as one of the decade’s most distinctive performance cars.