I once had about fifty odd packs dating from 1992 to 2003. As I got older they remained in a cardboard box which was never opened and just took up space. As more and more sets started to become available on Soundcloud due to good people like jj, I decided to get rid of them. I listed them on DnB Forum as free for collection and someone came and picked them up, said he was going to rip them to mp3 then vacuum pack them for long-term safe keeping.
I kept four of my favourite packs back which I still have on my bookshelf now.
This is probably my favourite pack, though I haven't listened to the actual cassettes for probably 15 years: