A masterpiece is by definition an artist's or craftsman's best piece of work. A masterpiece is valued by others because of its rarity, the craftsmanship, and the uniqueness that is evident to all who experience it. 

A masterpiece is not some run of the mill, assembly line product. It is not available everywhere because it is appreciated by a select few. Furthermore, all who seek the masterpiece will not pay the price for it.

Guess what?