Earlier quoted context omitted.
I wouldn't buy a Tesla from Carmax (I wouldn't buy a Tesla from anyone), but for everything else, it's pretty great. I bought my last car from them online at an extremely sane price, and they delivered it to my door; a few weeks later a better trim of the same car popped up on their site (many hours away), and I was able to exchange without any drama. I got pretty decent at car buying from dealerships over the years,…
My personal experience was that sites like carmax and vroom had significantly higher mark ups then dealerships and lots of complaints that their “360 inspection” had terrible quality control problems and frequently shipped bad cars. I can see these sites working for very specific models and trims but overall bad. Honestly it’s all bad unless you get lucky it feels like.
CarMax should be a little bit more expensive because you're paying for a 30-day return policy and 90-day warranty even if they're not itemized. But like, for the Tesla linked, nearby RWD 2022 Model 3s are priced between $55-60k from other sellers. So that's 5% over the cheapest comparable listing.