The used car market used to be just that.
But somewhere in there, I think in the 90s, that "Certified Pre-Owned" BS started creeping in and via that marketing tool changed the used car market. Changed it a lot in my opinion, to the point where many people are afraid to buy a used car from an individual - it has to be certified pre-owned.
The only people that get "owned" in these deals are the buyers of used cars from dealers where the prices are higher, always.