Bought my current car CPO with total 6 years / 100K miles warranty. It was a dealer service loaner, current model year, with 4800 miles on it. Still under bumper to bumper warranty today. Walked in with a check, walked out with the keys in less than 30 minutes.
My wife likes to tell the story of getting stuck at the dealer with me and the kids for 8 hours buying a minivan. Much was learned from that experience that will never be repeated. Including the part about the minivan.