Is there a Kelly Blue Book for carts? If I'm looking at a used cart, how do I know if the price is fair, or is it just a matter of looking at enough of them to get a feel for pricing?

Is there a Kelly Blue Book for carts?
No there isn't.

If I'm looking at a used cart, how do I know if the price is fair, or is it just a matter of looking at enough of them to get a feel for pricing?
It's a matter of getting a feel for it. This isn't hard if you're shopping for used at golf cart stores.

So true.

We have a 2014 Yamaha Gas EFI with many extras on it for sale. If interested, please send me a message. The reason we are selling it is because we live in a villa with a one car garage and we had one car and 2 carts. I just bought a car, my husband decided that we don't need 2 carts especially with 2 cars so he's selling his cart. He plays pickle ball close to our house so he rarely uses the cart.