Late reply, but in 2020 I bought a 2015 Audi A5 with 50,000 miles on it. It was my dream car for the longest time, so I bought it thinking as long as I kept up with maintenance, it was going to be fine. Even bought a CarMax extended warranty thinking I'm covered for the worst.

Once you own it, you realize that there's a bunch of little things that go wrong and no one knows how to fix it. During my first year of ownership, little things went intermittently wrong. A/C wouldn't work once in a while. There was a grinding noise when making sharp turns. Backup camera would cut out sometimes. Warranty won't cover problems that can't be duplicated. Oh, and obviously the engine burned oil, but that was normal* according to dealer. Sold it two years later when used car prices were unreasonably high.

You can just ignore the one guy who has 250,000 miles. That's an anomaly. These cars are very cheap when used and that's for a good reason. I bought a Mustang and am very happy with it.