I wouldn’t take anything to Carmax, at least not by me. When I was looking to move up and trade/sell my last car I played dumb and they offered me “rough book” thinking I was desperate to sell. I asked how they arrive at their values and they told me that their algorithm is very precise blah blah...yet they had a car on the same lot, same model, year, with 9000 more miles for 2.5 x their offer to me!
I told them to pound sand and sold my car for twice what they offered.. my family is in the car business 30+ years and wasn’t about to get picked off by some rando Carmax appraiser.