I've bought and sold cars from Carmax for 10 plus years. Lately they resemble standard dealerships with their high car prices and low buy offers on used cars,
The spread use to be around three thousand doallars. The difference between what they buy a car from someone that wants to sell their car and the lot price.
Lately I've seen their offers given to me be in the range of 6k to as much as today 8k.
I brought a car to sell to them that was exactly what they had on their lot and they offered 8k less than what I ended up selling it for to another dealer.
Won't be coming back.