Why are models of cars so pricey?

I had a couple models of my favorites...1969 Charger....Hemi Under Glass...then was offered a whole collection of Danbury-Franklin Models. 170 models. As I researched them prior to getting them all, I found that China is not making them any more...too expensive and the price was slowing down the export.
So....that means scarcity...fewer available...higher prices for purchase. They are beautiful and precise....perfect to display....and no oil changes or carb problems!!
That's why I got the whole collection....started in the 1970's.
I'm now a seller....ha!
Howard