How do you find values for cars made before 1990?

Kelley Blue Book offers an Early Model Guide edition of its reference book that contains the values of vehicles manufactured between 1946 and 1988. The company only offers this guide in print and updates it every six months.

Customers can purchase the Kelley Blue Book Early Model Guide at retailers such as AutoZone, Barnes & Noble, Wal-Mart and Virgin Megastores. Alternatively, customers can subscribe to receive this edition twice a year through Kelley Blue Book's toll-free subscription hotline. This edition is focused towards collectors; in addition to values, it provides information to help identify specific models and variants of vehicles.