First I'd sort them by country and or topic, ID any of interest and see what's there. That's half the fun of this hobby in my opinion. I'd give it some thought and see if there are any that I might want to keep or get into in the future...
Watch
ebay for inexpensive deals on stock book or stock pages, even used come up frequently for much less than new. Album pages can be down loaded from the internet for free or a nominal fee from:
APS website
https://stamps.org/Free-Album-Pages,
https://www.philosateleia.com/album/ and
http://www.stampalbums.com/free_us.asp If giving them away or donating them - first I'd separate those that are damaged (if any). Put them in a separate marked envelope and include them as 'examples or place holders'.
My first pick would be a kid that might have an interest. It's a perfect opportunity to infect the next generation with the sickness... I mean introduce them to the hobby.
Second would be the kid's table at a local show. That's one of my favorite dumping grounds for low-value stamps that I don't need/want. The Boy Scouts, a local CAP squadron, The VA or a retirement home may be other good places.
I hope this gave you some food-for-thought,
Jeff