NADA Used Car Guide, a division of J.D. Power, has been a leading force in the automotive industry since the early 1900s. We’ ... ve seen the industry through waves of growth, innovation, legislation, war and recession. After nearly a century spent collecting and analyzing vehicle values, NADA Used Car Guide has built the largest database of automotive transactions and gained the most far-reaching marketplace knowledge. This legacy of information and expertise forms the foundation on which we publish every value. Our rich history is also part of the reason why NADA Used Car Guide values are so accurate and trusted. read more