People believe bullshit. That's how marketing works.
I love my Kliché, it's one of my favourite overdrives. I also built the Chuck Bass version, and I'm a big fan of that one too. But they're just pedals, a few bucks worth of parts in a metal box. There's no magic about them, we all know that.
So why is my Klone worth $50 or whatever I paid to build it and a genuine Klon Centaur worth thousands of bucks? Objectively they are not. Same circuit, same sound, within the range of component tolerances. The one I built sounds a little better than the Klones I've tried, in my opinion, but close enough that it makes no real difference to anyone but me.
But people don't want to hear that, they want to hear about magic. So the Klon guy came up with a story about magic diodes, and that he owned the world's entire stock of them, which everyone here knows - or should know - is marketing bullshit. But people eat it up, because they want to believe in a special magical pedal that only special magical people get to use. People want exclusivity - they want to own something that guttersnipes like me will never be able to own.
Lots of well-known players use Klons. Keith Richards and Ronnie Wood have them on their boards. I think that some of the snooze blues guys like Bonamasser and Mayer use them. People want to have some connection to their idols.
So, you get someone who believes the hype and has a lot of money, and they start bidding up the thing they want. And very soon utility value - a fair price for a useful object - becomes incidental and collectible value - whatever people are willing to pay for an authentic doodad made by the magical guy and that the other magical guys all like and use - becomes the going price.
At which point the owning of the thing becomes more important than the use of the thing.
I'd like to say fools and their money are soon parted, but realistically collectibles will remain collectible for the foreseeable future. Peoples' belief in bullshit ain't going away.