You do know, you can sell your books to Amazon or on Ebay also. There are also some really nice second hand shops that will take books as well. Someone will snatch up your unwanted or not needed books.
I too have gone through most of my books. And have kept the ones that really appealed to me. But, I keep a lot of books and PDF's on my Kindle's as well. I have 2. A paper white and a Fire. And, I love them both. Really the few books I keep now are basically back ups in case for some reason my Kindle's aren't charge. I also keep about 20 reference Quilt books on hand. (I used to have many many more.) I buy paper copies very selectively now.
I feel like a lot of you, I can always buy it again or borrow it from the library.
But, the electronic books really do save time and money and space in my life.
So, if these books no longer bring joy to your life, let them go. I'm sure you can find someone who will appreciate them.