N.A.D.A. Appraisal Guides has been America's largest publisher of used
vehicle values for more than 68 years. The values are derived from
sales records collected for each vehicle; the vehicles are classified
into one of three value categories based upon the vehicles condition--
low, average, and high. Once the sales data has been processed,
N.A.D.A. editors analyze current market conditions pertaining to each
vehicle to determine accurate fair market values.