It seems to take about 15-20 years for outdated junk to become collectible vintage.
An old shop I used to work at had tons of 80s BMX stuff - green and orange chainrings, gold anodized brakesets, Kashimax saddles, Mushroom grips, etc. Couldn't give that stuff away in the 90s, but now people will pay ridiculous prices for it. Wonder if my boss hung on to any of it. He's probably kicking himself if he didn't.