Who says you would not have given one away or junked it in a move or spring cleaning since 1993-4 and felt even worse letting it go through your fingers?
You need quite a bit of cash , space, and time if you want to speculate on something being worth quite a bit of money down the road as a collectable, especially when it is worthless "junk" at the time it is available. 99.99% of what you hoard will still be junk in 15+ years down the road and the few items that are worth money will probably not offset the time, money, and effort needed to preserve all the rest.
There probably isn't a long term collector in this forum that hasn't picked up a few items for little money that ended up being worth quite a bit more down the road. There are also people here that did pick up early 70's machines (or earlier) that are pretty rare but are not popular and are worth little today.