I still have mine, but am going digital. If you use it, have it serviced first- replace all o-rings. I can recommend a place to get it serviced.
They can be great for U/W pics of whales if you ever go on a whale trip. Some pros I’ve met have used them for whales. Pick up a Nikonos 15 mm lens on eBay, and set it on auto exposure. IIRC, I read that Amos Nachoum preferred film over digital for big animals, but that may have been early in the digital era.
ETA: I’ve wished that someone could make a digital camera back for them- something that could replace the rear door/cover, and contain a 35mm size digital sensor, and have controls or display on the exterior side. There probably would not be enough of a market for them, though.
ETA2: they take great pictures, BTW. I have dozens of exhibition quality photos from my Nikonos-II and Nikonos-V taken over the past 40+ years. The lenses made for them are still considered superb.