u/FilmFighter4Life

I've been debating for a while on which camera to get. Does anybody know anywhere to get a cheaper Nikonos RS or any information on why a Nikonos RS isn't or is a good camera? I've had my eyes on one for a while but right now I can either get a really nice Nikonos 4 or I can try to lowball for a Nikonos RS. I'm looking for a new underwater camera since my Nikonos 3 currently doesn't work correctly. I only ask since detailed information on the Nikonos RS seems to be sparse.