The NADA guide and the Kelley Blue Book include information about used all terrain vehicles. Both price guides are standard across the used ATV industry. The prices that appear in the guides are the average prices that dealers are willing to pay for ATVs of any specified model year.
In addition to base prices for ATVs, both guides also contain information about how condition, options and other factors affect the price of a used ATV. The guides only contain information for options available from the vehicle's manufacturer at a dealership. They do not cover price information for any aftermarket options or modifications.