Anything I don't have! Sometimes I'll find a torrent and no seeds/peers and I'll wonder if there is another torrent out there that has the same files in it somewhere that I can find.
The other day it was trying to track down some older High Times issues that were torrented but the torrent is dead. Last night it was a mag titled Films & Filming which I know is scanned, but I can't find anywhere.
High Times is mostly on archive.org, if you need that one. I'd sort of like the film-making one, I'll put some time into that. On my list of periodicals, I think the count's up to 500 that I consider important enough to archive and I'm nowhere near done with it.
Can I get a copy for the Internet Archive? Will take as much of the corpus as you’re willing to provide.
(no affiliation with them)