I mean, who hasn’t heard of Kelley Blue Book, right? But still it’s nice to know what your car’s value is, and KBB is a great place to find out. They’ll even give you a cash offer for your car if that’s what you’re interested in. I personally used it (not an ad, just a fan) when I wanted to sell my Nissan Leaf a few years ago. KBB gave me an offer and sent me to a local dealership to verify the car was in said condition, and once the dealer saw it, they countered with even more money! It was a lot more than what I was being offered on a trade in from a different dealer where I bought my new car, so it was a total win!