Most thrift stores have more books than they have room for. Always on sale.
When I was writing, I didn't read anything published after 1725. So I was forced to read online. Studies have shown it's harder to hold on to information reading that way. Not to mention it's not easy to take your device into the tub.
But I need to downsize. Half of my upstairs is library. Still have stacks of books everywhere. I don't really read anymore {other than waiting rooms}, and have stopped buying books. If you were close enough, you could take a few boxes.