A used car is a USED car, not "pre-owned" any more than I am "pre-dead" as long as I'm vertical, or the food in me belly is "pre-deficated."
I bought my current car (a reasonably lux and sporty V8 sedan that originally sold for just under $70k) from a dealer after it came back from a 3-year lease program. I told the sales droid that if he used the phrase "pre-owned" instead of "used" I would have to assume he was concealing or distorting other information about the car too. I'm sure he would have told me to go get stuffed except he knew I could pay outright. So he rolled, and spoke in plain and truthful terms about the USED car that I eventually bought. Oh, the power of the checkbook.
And one other thing: At 99.9999_% of dealers "Certified" means they had the most junior mechanic in the place run down a checklist, then detail the car. Maybe, maybe even an oil change and filter, but nothing more. Ever. However if Musk designs a CPO program where they throw the vehicle back on the assembly line, have the robots remove the body panels/battery pack/motor, check alignment/tolerances/fatigue, and then reassemble... yeah, that would be worthy of the notion of "certified."