I would like nothing better than to get rid of some of my paper books. I used to belong to The Mystery Guild and I have a bunch of smaller sized hardcover books from series that I collected in those days. I do reread them, and when I do I burn through them so fast that it is worth it to me to keep my own copy. The series are so big that I don't want to replace them all at once; I'm working on replacing them one book at a time, one series at a time.
However, there are some books that I don't want to get rid of (yet), but I'm not saving them as collector's items -- they are mismatched and incomplete (generally a mix of trade paperback for the beginning of a series, hardcover for the later ones, and then nothing because I only bought the ebooks.) There isn't any value to keeping them, but I like knowing they are there and it is worth keeping them just for that.
Relatively off topic
Goodreads has me at three books behind my posted goal, which is to match highest number of books I read in a year since I started keeping track. I didn't meet my (same) goal last year, and I was one book further behind at the beginning of May, so it looks like I will not make it. I'm still reading back issues of
The New Yorker, so it's not that I've stopped reading; I don't feel like I need to change or step up what I am doing. (My real goal is to track all my read books, which I'm keeping up with really well.)