Why do some discontinued Rolex watches keep climbing above retail? Take the...

https://echo-wiki.win/index.php/White_Gold_Pepsi_126719BLRO_Resale_Price_After_Discontinuation

Why do some discontinued Rolex watches keep climbing above retail? Take the Kermit 16610LV and the Hulk 116610LV—both iconic Submariners that collectors chase because of their unique green hues and limited runs