Are you a car seller? Or perhaps you plan to buy a second-hand car for yourself? No matter what, if it is cars, then this is the site for you. They are one of the largest and most trusted vehicle valuation authority in the United States. You can check out how much your vehicle is worth in the market right now. You can even find out how much a new vehicle is actually worth. Yes, don't get conned by all those slick car salesman now! Kelly Blue Book started out as a used car dealership and the founder started giving out lists of used cars and how much he was willing to pay for them. Of course, in due time, it became the standard for purchasing second hand cars.