Nikon SP range-finders are very rare and collectible cameras, especially when it comes with a range of lenses and accessories.

I don't know the point system, but if I would buy a old camera I would look at the following: to find out if the shutter is still properly working; put it at 1 sec. and press the button; it should be one smooth solid sound with out and slips.

If you look at the bayonet (what hold the lens to the camera) it should not have to much scratches, if there is none you know the camera is hardy used.

Make sure the diaphragm comes back to it's old position after firing the shutter.

And the best way to find out if everything is working put a film in it and shoot at every single speed and F-stop.

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1979 Black on Black, 300CD (sold), 1990 Black 300SE, Silver 1989 Volvo 780, 1988 300CE (vanished by the hands of a girlfriend), 1992 300CE (Rescue).