Why do some discontinued Rolex models quietly command prices well above retail?...

https://highstylife.com/box-papers-service-card-what-should-i-gather-before-selling-a-rolex/

Why do some discontinued Rolex models quietly command prices well above retail? Take the Kermit 16610LV and the Hulk 116610LV. Both stopped production years ago, yet their unique looks and strong collector demand keep values high