How 'bout a 1986 Avon?
Yep, I have a 1986 Avon and, except for a little wear where the rear fiberglass seat locks into a handle, the dinghy is in excellent shape. Admittingly, I only use it approximately 25-30 days a year, the key to its long life is storage out of the sun. After each usage, I give it a freshwater bath, spray 303 on all surfaces, and, after drying, roll it up and place it in the original canvas bag. She is made out of hypalon. Realistically, I've owned the dinghy since 1986, at which time I purchased it for $500. I then took it to the local Avon representative and had him replace some patches and install towing harness rings. That was twelve years ago. After an upcoming September trip, I plan to take it back to him for some repairs such as the one problem mentioned above.
Several of my friends have dinghy's made from PVC and, in my opinion, it just doesn't hold up like the hypalon.
Dick