If there has been anything that I've learned in dabbling in collectibles, its that you have to strike while the iron is hot, and if millions of others are doing the same thing that you are in hoarding something away in hopes it will be worth something in twenty years, the only time that iron is going to be hot is early on before everyone starts cleaning their closets out. A lot of folks who got into baseball cards back in the 80's found this out the hard way.
So I can't blame folks who were trying to get $30+ for Ten Year Anniversary Buzzzes right after snatching them up at retail. You're going to be lucky to get that down the road.
this is a good point, especially with new plastics in the future. Some of those old discs are going to get passed by.