That one website that tells you what your car is worth before you sell or trade it in

Why it's the pick

Kelley Blue Book gives trade-in and private-sale value ranges for your exact car, mileage and condition, which is a good number to have before a dealer makes an offer. Free and US-only; it also offers dealer quotes and an instant cash offer, which you can ignore. J.D. Power's values (the old NADA guides) make a good second opinion.

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