Other than the internet archive obviously
I’m searching for old media, 90s popups, old magazines, weird posters, odd exploitation films, just generally anything that is almost being erased and is not commercially friendly. Where are good places to dig stuff up like that?
If you are a torrent user, you may find a lot of fun things on the tracker Cathode-Ray Tube.
It’s sole purpose is media that is 20+ years old, and it’s basically a tiny version of MySpleen - lots of old, rare, obscure, and (a recent increase in) foreign titles. They also have a LOT of WOC content - TV recorded with original commercials, which is my favorite part of it.
Less-so on magazines and print, although there is some of that on there.