Investopedia / Alison Czinkota What Is the Value of Your Used Car? Approximately 40 million used vehicles are sold each year, according to Edmunds.com, an online automotive review site. The companies tracking those sales provide an invaluable resource—detailed information on what sells and for how much. These are the figures anyone looking to buy or sell a used car needs to know to be sure they are getting a good—or at least fair—deal. Key Takeaways: Understanding How to Value Your Used Car Kelley Blue Book ...