Determine the value of a used Ford Fairlane 500 by looking up listings of the same model in similar conditions on classifieds and auction sites such as Hemmings.com, Hagerty.com, ClassicCars.com and eBay.com, as of 2015. Take into account the overall state of the car, any signs of damage, its mileage and whether or not it has original parts.
One important factor when determining the value of a used Ford Fairlane 500 is its physical condition, as a vehicle with obvious damage is worth less than a model without any damage. Look for signs of rust on the body, particularly near joints or around the hood and trunk. Check the interior for any scratches or rips, as well as signs of repairs such as tape over a rip in the seats. The condition of the engine is also a major factor in setting price. If the car runs but its engine sputters or releases smog, it is not worth as much as a Fairlane capable of legal street driving.
Other factors to consider are the types of parts it has and its mileage. As with modern cars, lower mileage means a higher resale price because the car likely experienced less use. Also, the presence of original or authentic parts increases the value from a collector's standpoint.