:welcome:to AGO!
Can't say I agree with ya' on lighter colored interiors, as I can't stand black ones. :laughing: (
Just waaaaaaaay too hot, dark, and on small cars... makes them look even smaller.)
Not really sure that is indicative of something CarMax did. Maybe something that was already done. :dunno: I know I did their towing for YEARS, and picked up literally thousands of auction vehicles for them, and they'd "RTV" (Return To Vendor) a vehicle that looked like that.
YES... they have first rate reconditioning shops (especially when compared to any and all other car lots) but their inspection process is what really separates them from other dealerships with everything you can think of being checked. Only when you move up towards Certified Pre-Owned (at like kind dealerships) is there something similar.
That isn't saying that they wouldn't be using plastic dye, because I'm sure they would, did, and will continue to do. But those carpets look REALLY BAD.

I've seen them return vehicles for MUCH LESS.
That being said; they also have those special cars, ones that are under $10K and occasionally the "as-is" units that are even cheaper... trade-in's that haven't been sent to auction yet. (
Yes, they send their junk to auction as well.) Thing is, they'll pay more at auction than your average car lot, then do more to those cars to get them ready, then of course put a price on them that is more than you can usually go across the street and buy them for.
Not defending them, by any stretch of the imagination.... just saying that if I were buying a used car that I'd certainly not be afraid to go there. (Just be prepared to pay higher prices for them!) I've spent untold thousands of hours in their locations, in their buyers offices, and loading and unloading their vehicles. They are somewhat if a meat-grinder to their employees as well. Then again, who isn't these days.
If you guys think though that what you found is something that they tried to hide, you SERIOUSLY need to address that with their managers. Don't worry so much about trying to fix it, rather have THEM rectify the situation. In my experience they'll work with the buyers, even if it means you just get something else. Of course ymmv..... :dunno: