Hi N1KK0,
the problem with rideons is that they work hard and cop a battering. I rebuilt a Greenie for a mate some years ago and it is still going fine but I spent about 6 months repairing it, not working on it flat out but reasonably consistently and the previous owner had spent $1150 on it before he cracked the sads with it (he gave me the receipts) and I spent another $650 on it. New motor and all the other bits that still needed fixing after the $1150 he had already spent on it. And I didn't get the brake to work properly but luckily his land is reasonably flat. Generally you won't find a "bird with a broken wing" usually it will have both legs and wings broken.