Value Your TradeFour simple steps to discover your car's Kelley Blue Book value.About Kelley Blue Book® ValuesFor over 90 years, Kelley Blue Book has been The Trusted Resource for used car values, helping car owners understand what their used car is worth. Kelley Blue Book Values are the results of massive amounts of data, including actual sales transactions and auction prices, which are then analyzed and adjusted to account for seasonality and market trends. Kelley Blue Book Values reflect local conditions in over 100 different geographic regions and are updated weekly to give consumers the most up-to-date used car pricing information., Get your car's value in real-time from Kelley Blue Book, the most trusted resource on the planet for used car value. Get Blue Book resale value, trade-in value, or even a cash offer from a dealer , What is the Kelley Blue Book value? How can it help when you're buying or selling a car? Edmunds experts break it down for you and give you the pros and cons of using it in your negotiations..