Mother recently passed. Now clearing out house. Father was into photography for a long time. Has several older cameras, lenses and a couple of telephoto lenses unused for many years. Also had his own darkroom. Equipment  and chemicals still there (maybe 20 year give or take). Several projectors and reels. Something that looks like it was for film splicing. Two unmounted projector screens. Not sure what to do with it all. Could maybe set up a darkroom in my basement and take a stab at learning how to develop film but not sure how big a task that might be. Don't know if the chemicals would even still be good. If there is a market for that kinda thing I guess selling is an option. Suggestion?

Not sure what the market is for that stuff these days.

My grandpa had all that type of stuff and his own darkroom, etc after a lifetime of being heavily into photography. But even ~10 years ago by the time he passed, he had moved exclusively to digital.

Edit to add: I ended up with a couple of his old school cameras, which my wife has on display on shelves in the living room as antique looking decorations.

That's about where I am on this. My dad also made the move to digital a while back. I have found several rolls of exposed undeveloped film which are probably more than 40 years old. Would be interesting to see what is on them but I doubt that is even possible.

Chemicals won't be any good but the equipment is in demand.  Film is making an interesting nostalgic come back in a big way.  If you want to get into developing your own film, it's not that big of a deal.  I currently develop using D76 for black and white, C41 process for color negative film, and E6 for color reversal/slide film.  The techniques for developing film have advanced quite a bit.  Now, you mention the projector screens, that is for doing your own dark room prints.  That is a cool process.  I have a projector and some of the stuff to do prints but I haven't done any yet.  I may do it in a year or three.  

My vote would be for you to keep it and learn how to use it.  Film photography is a blast.

Chemicals will have an expiration date and might be useless if you don’t have the right buyer in case they are still good.
Camera bodies might have some value with the little resurgence of analog film but also here the right buyer needs to be found.
The money is in the glass. Check out eBay for closed auctions for each lens by manufacturer, focal length and aperture. For the right glass they are worth a lot.