I used to donate to my library. Hundreds of dollars of books. But I noticed over the years that a core group of volunteers, older, probably retired folks, glean the books for lst editions, sellable books to hawk on websites, etc. ....so, when the library has sales, it's mostly crap. :(
Just my sad two cents.
OTOH, retirement homes and hospitals love book donations. I have been a patient a few times and really appreciated the books and magazines.
well, one day we'll maybe be that that guy close to retirement, going thru the motions to get the pension: if we're lucky. try to put your self in his shoes.