I just got an old Garmin Edge 520. It seems to work absolutely fine other than it does not connect to my iPhone 13 Pro. My iOS is 15.5 and Garmin firmare
Garmin Edge 520 | Computers & GPS | Bike Hub
Reset Issue with Garmin 520 - YouTube
Garmin 520 shows "Factory Reset" screen on boot and won't respond to any button press : r/Garmin