I guess it depends on what kind of a collector you are. Do you collect, hoping that things will increase in value? Or do you have all those discs because you love the music? I collect music - I don't care about the artwork, the case or anything else (I know - it's heresy ) as long as I have high quality lossless music files.
I'm the same with my books, I have copies of books that others wouldn't have in their houses. But they are "old friends" of mine and they stay.

Kathleen