Greenhorn here. Yesterday I turned down buying an RV at a great price because it had a small amount of de-lamination on the driver side rear. It was clear that the roof had been recently repaired, s...
You made the right call. As others have said it's more about what you can't see that's the issue. Damage aside you also need to consider mold and rot. There are PLENTY of used units out there without issues to even consider one with issues unless it was a killer deal and you know how to tear it apart and fix it. Also remember that if you ever want to sell what it will do to your sale price if an issue is noticeable.