"Do you ever weed out unwanted books from your library? And if so, what do you do with them?"Oh, sure! When my shelves look like this (photo from 2011), it's time to reconsider which ones to keep. I always manage to get rid of some of my books when I move. If I didn't weed out my books periodically, I would have nowhere to sit or sleep or eat because every flat surface would be covered with books. What do I do with those I discard? I take some to used book stores for trade credit. Notice that means I'll be replacing them with more books, possibly even the same day. Sometimes I give away my books, to my son or my friends or even some random stranger who may have found the one book I released through BookCrossing.
When I sold my house and moved to an apartment in 1984, I got rid of over a thousand books, by count in other words, this was not an estimate. Nevertheless, I still have thousands of books, many still in boxes from my latest move last summer. I've run out of shelves, so I must either get more shelves in my new place or get rid of boxes and boxes full of books. I'm trying to keep only books I still plan to read or know I want to re-read. And still I bring in books from the library every week. Yes, I know I'm crazy. A crazy book lady.