It's a hand-made design object sold for a high price. That's a luxury good. They don't need to scale. The limited availability is part of what they sell. It's

It's a hand-made design object sold for a high price. That's a luxury good. They don't need to scale. The limited availability is part of what they sell. It's a niche market. Sure, it won't make you a billionaire as is but you definitely can make a very decent living this way.