I think it depends on where you live and how much driving you do.
- cars on the West Coast get little road salt compared to vehicles in the rust belt. Being garage kept makes a huge difference, especially for sunroofs.
- when choosing vehicles, I typically look for popular vehicles with high sales volumes. If you plan to keep a vehicle more than 10 years, gettings parts is the challenge. I'm sure your mechanic will tell you examples of vehicles worthless when a critical transmission or engine component was no longer available.
- the quickest way to make a car look old? Park the car in a busy parking lot where you get a custom dent job. My vehicles are parked at the farthest spot that makes me walk.
- oh my cars.... one is 31 yrs old and the second is 22. Looking at adding to the harem next month. I average 15000 miles a year across all my vehicles.