[Lucky]

I'll second much of what Red Rocket says. I'm also shopping for a car (daily driver) and have spent time researching the Carmax Maxcare warranty. It is an aftermarket warranty, not from the car manufacturer. You can choose different mileage and deductible amounts to adjust the price point to your desired amount. Unlike most dealers, Carmax doesn't generally negotiate on prices including those for warranty.

Something to keep in mind, all warranty repairs will require pre-authorization. You can use whatever shop you want, including dealers, but you must make sure the shop knows you are using a warranty and agrees to get work approved before they do it.

If I end up buying a car from Carmax, I'm going to ask for a few days to decide on Maxcare and see what I can get from other sellers. I'm confident you can get the equivalent at lower cost from someone else. However if the saving isn't significant, I may go with Maxcare as I think it would provide another avenue for recourse if a dispute arises with the warranty company.