The 80s and 90s cards will never be worth anything except a few rare exceptions (Henderson rookie, Jordan rookie, Gretzky rookie Griffey Jr Upper Deck rookie, and other HoF rookies). And to be worth anything, you have to get them graded by one of the top 3 grading services (Beckett, PSA, and SGC). I threw mine away years ago except for my Rickey Henderson collection and a select few cards that I still thought were cool regardless of their value. I never looked back.
We are in junk era 2.0 as we speak now. So many parallels, so many 1/1s (Skenes must have like 200 1/1s it seems), so many inserts, so many variations, so many sets. People are spending a fortune on them the last few years and production numbers are so high. Unless its an auto or a very low numbered card, none of them are going to be worth anything again. Meanwhile, Topps is just raking in the cash. Personally, I just buy singles now instead of boxes/packs.