There are a number of excellent sources for great used cars. I prefer privately owned cars that have been "Dealer Maintained" from Day #1. A second source are cars coming off a three-year lease. You may also find a "diamond" on the dealer lot that has just been traded. We traded my wife's former car for her new one and the old one never made it off the lot. It was sold before we left the dealer. You could speak to the service manager and ask him to be on the lookout for your car. Having rented cars many times, I would not buy one from a rental car company.
Regardless of your source, "CarFax" is your friend! True story. I have a 2004 Lexus LS 430 and wanted to replace it with a newer model. My local Toyota dealer had one. A 2024 LS 460. 8,000 miles. Exceptionally clean. I hit the CarFax report. It came from Beverly Hills Lexus. Wow! A movie star's car! Well-maintained, as required by the lease. It was about ten months old, but, (drum roll please) I looked at the CarFax report. It was involved in three minor accidents during the time that it was in CA. And then, I asked myself, why would a CA Lexus be shipped to Tennessee for auction?? I am in the Atlanta area. Dead skunk time! I drove it over to the Collision Center and in less than five minutes the manager confirmed that the CarFax report was correct!
Next point. My Lexus still drives and rides like a million dollars. However, car manufacturers usually make design changes every year. My HS friend found a 2016 Lexus LS that a Coca-Cola executive in Atlanta tuned in at the end of a three-year lease. The car is immaculate! But, Lexus changed the tire size (15" instead of the old 17") and eliminated one of the ride choices. My friend did not test drive the car before he bought it. It does not ride at all as he had expected, and he is not a "happy camper"!
Back in the day when we were coming along you could pay a mechanic to check the potential car purchase over. Now with all of these litigious (lawsuit happy people), it may not be possible in your area.
Bottom Line-I have always been successful buying a great used car. The challenge is finding one that meets your requirements, but it can be done! Good Hunting!
Cheers!
Bill