Being a collector is a serious calling. It takes dedication and persistence to find all the pieces of your specific set of figures, cards, plates or toys and adding them to your collection. We do this for one of two reasons (or both); 1) we’re huge fans and absolutely must have it all, or 2) you believe that it’s gonna make you rich some day.
If you’re the former, good for you, go get all the shit you can find. If you’re the latter, well… you might be out of luck. A lot of the things you believe is gonna be worth something, probably isn’t anymore.
Probably should just sell it for whatever you can get for it, or just toss it out. Turn that storage space into a home gym or something. That’s a better future investment.