The value of a vintage license plate can range from just a few dollars to several hundred dollars, according to Pamela Wiggins, the antiques expert for About.com. The value for specific collectible license plates can be found in various price guides either in book form or online.
A number of factors determine the value of a vintage license plate. One key factor is the age of the plate, as older plates are worth more as a rule. The condition of the license plate is also extremely important. Collectors value plates in excellent condition far more highly than plates that are bent, worn or rusty.