The NADA blue book is a mighty useful tool not only to buyers but to vendors as well. It offers you a non-biased view on the actual value of campers. For example, you are in search of a pre-loved RV; you need to thoroughly analyze first the features of the RV before making a decision. There are many aspects to inspect such as custom grills, water filters, water quality, toilets, special add-ons such as temper-pedic mattresses and other amenities. As you take it for a drive test, check out the maintenance history, mileage and listen carefully for any odd sounds. Whether it is a Newmar RV, Jayco RV or Forest River RV, the NADA RV blue book will be your guiding light in the motorhome that will match your wishes and desires.