Oddly, I have never owned a LaserDIsc player, yet I *DO* have the entire Star Wars Trilogy, each in their very original home-media LD release. (This one, for example.)
I have owned 2001: A Space Odyssey on on every home media it has ever been released on. (Although not every version - only one of each media format.)
As for that top 10 flops - I have owned, in some way, 5 of them. (i.e. LD, but no player, Betamax tape, but no player, Windows Vista, Nokia N-Gage, Newton MessagePage,) and would love to own two more (VirtualBoy, DeLorean.) They're also missing some even more epic flops: HD-DVD, DIVX, DCC, even MiniDisc was a failure in the end, thanks to MP3/iPod. (I have owned two of those.)