So, after the post-purchase inspection, the shop, which does work for CARMAX, came back with $1300 in repairs, much of which should've been caught before sale - headlights and plate lights out, disgusting air and cabin filters, not very cool air, streaking wiper blades, differentials need changing. Took it back and they're going to do all the repairs because I have 10 days to send it back and let them know I'd use it. They give me a loaner while it's in the shop next week. I'm happy with the car and the sales process, and would actually recommend them. But take it to a mechanic, as with any used car purchase.