Perhaps beanie babies is an example that we actually know about.
there was a supply crunch with the manufacturer in China, it was rational to think it wouldn't be solved, creating a limited supply item that had more demand than the supply. the founder solved the issue and flooded the market with beanie babies, prices crashed at that point
It was 100% to do with Ty corp's very clever handling of distribution, limiting where, who and how many Beanies could be sold.
There was a huge over-supply of the less rare Beanies and a huge under-production of the rarer ones. All done on purpose.
https://www.cnn.com/2025/06/21/us/labubu-doll-plushie-pop-ma...
https://nypost.com/2025/08/02/us-news/this-is-the-most-expen...
It burnt out much faster than Beanie Babies did.