My recommendation is to take the entire lot to eBay, cards and all. Set the minimum somewhere between $500-750 and let the community bid. You have a couple really nice pieces in there from what I can see. Most are older but not to sought after. Selling them 1 by 1 would take a good bit of effort.
For what it’s worth, when you post here, you’ll want to have your YYE username and date somewhere in the photos.
Good luck and sorry to hear about your grandfather.