The best way to check the value of the software is to scan the UPC code on eBay's search bar in their mobile app and see what's currently listed. Then go under search criteria to hone in on sold listings to see if and how much they sell for. If they're hard to find and not even listed, you can make your own price and just let it sit as a Buy It Not listing. Since you owned the software and have the codes/can attest to them being complete, that's a plus to mention.

Old cameras aren't bad to sell if they're still functional, have no light leak issues in the film door, and no fungus, etc.. The same goes for the lenses. While probably no UPC codes, look up each model on eBay under the sold listings search criteria and get a sense as to about what you may be able to get for them. Once you take pics of your items, put them in folders on your computer by name or a reference number, and use those pics to post the same item on other platforms you may have locally. Books are hard to tell, but if any are old/rare/have UPC bar codes, look them up by publication year and see. If you have a lot, try to look up a couple at a time and determine if they're worth selling or donating to a library.

Nothing is worthless unless you deem it so. There's always some way to make money off the stuff individually or as a package deal.