Dwindling number of those around, intergranular corrosion of integral ribs in upper wing skin scrapped many, engine maintenance costs high too..
There are some used as fire fighting aircraft in western Canada, 'Airspray' comes to mind, may be at red Deer airport near Buffalo Airways, not necessarily related.
Advantage in remote areas and forest fire suppression from constant speed engines in flight giving much faster power response than classic JT8D et al.