As of 2015, the typical value of a 1964 Chevrolet Impala is about $10,340 for an eight-cylinder sedan with a 327-cubic-inch, 250-horsepower engine. The typical value of a 1964 Impala SS eight-cylinder convertible with a 409-cubic-inch, 425-horsepower engine is about $69,370. The model, condition and features affect the value.
Impalas that are in No. 1 condition have the highest values. No. 1 condition cars, the world's best, are groomed to perfection. For example, a 1964 Chevrolet Impala eight-cylinder sedan with a 327-cubic-inch, 250-horsepower engine in No.1, or concours, condition has a value of about $22,000. The same model vehicle in No. 4 condition, with visible flaws, has a value of about $7,100.