Hey everyone. I was helping my father clean out some of his storage room, and we found an old SLR camera he had. A pentax ME super with 3 lenses, a 50 1.7, a fisheye, and an 85-205 telephoto, which I believe has a constant 3.8 aperture. All the lenses are Pentax K-mount (is this mount still used?) The body itself is completely manual focus, and so are the lens apertures.
It looks like it is in fantastic shape, and he is going to go get a battery for it, and some film to test if it still works. I have never shot film, I got into photography when DSLR's where just becoming affordable (Got a Rebel as my first), and I have never had a full frame camera. Would it be worth it keeping, and playing around with if it works fine still?
If I decide not to keep it, would it be worth anything? Thanks for your help!
It looks like this:

