I think I can help you. I recently sold my 4xe and I had some of the same questions you have now. As for Carmax, call them and tell them you want to do an online quote. It’s a link they send to your email for you to upload photos that goes straight to Carmax. I believe the same thing happens when you bring it but instead some guy over there does this instead of you. You upload 12 pictures which are clearly labeled. They want stuff like side mirror, the dash, the miles, front, back and so on. Once done, they will give you a link for you to click for the quote.
You can also get quotes from this thread. It’s what I used to reference and get offers. Half of them gave me numbers while the other half didn’t work out for various reasons
You can try selling it to your local Jeep/Chysler dealer and see what they give you. All of them required me to bring the car in which was a pain in the ass compared to online websites. The dealerships are just too old school and aren’t adapting to the current better way to sell a car. I sold my car to Autonation for $61,250 but mine had a higher MSRP. Payout was $52,800