with the # of baseball cards printed, it will take 60-80 years before they are worth anything, and then only great players will be worth something, and i really can't think of any real "greats" like Babe Ruth from the 80s-90s. I don't recall the 60's cards from my uncles collection being worth a lot until the late 80s, not even sure what they would be worth now, stopped following in the 90's ..
Other item is "90's comic books" pretty much most of them have lost value do to overprinting.
I think i have/had some that went up in value a little, but then fell out when a movie came out and bombed ( ie, Spawn ) .. So many franchises started , and then died off.
To me, pinball will probably stay at 80% of retail price for anything post 2010. only a few titles will command a higher dollar amount, and those who bought them when the market fell will reap the rewards.