I had the chance once to get a GLASS laserdisc. Very limited runs of custom laserdiscs were written to discs that had glass platters and a pink substrate instead of the usual plastic platters and a pressed silver substrate. They're very fragile but look VERY beautiful.

I still see CED once in a blue moon but the people have no idea what they have so they want $15 per movie and $70 for the player. The movie selection on CED is even worse than Laserdisc and ain't worth it.

Edited: The ColorTrak 2000 on the other hand was. My grandparents owned owned one and I owned one right until the tube wore out. They even had SCART. There was NOTHING in North America that even used SCART but it came with it anyways.