Good Morning/Afternoon/Evening!

I recently started working in an academic library and they’re in the middle of their weeding process. As a result, we have a crapton of books being packed up and thrown out. I’ve taken the liberty of stealing a lot of the books to make crafts. However, I’ve noticed a lot of these books are in really good condition or look genuinely interesting and just haven’t been checked out since 19XX. A lot are also so old that they don’t have an ISBN or anything like that. I was wondering if you all had any recommendations for where I could sell these books or give them away?