I put my Schomburg raw copies in them. I also have a few raw SA Marvels in them. TTA 35,44, TOS 48,49,52, 57. Buy them cheap and they offer tremendous value for displaying books. Once upon a time, CGC offered a $5 credit fo each returned label, which could add up pretty quickly.
People die, people get divorced, people move and stuff gets lost, people have kids and priorities change. Stuff gets stolen. On rare occasion, I truly believe comics just run away. I never think about why a person slabs his books.