Scarcity and difficulty of production, not just usefulness, are what let a seller charge more.

Drawn from what Justin Jackson said

What this subject means

capitalism Markets as a system rather than a market: what it is for, what it costs, and what people mean when they say they are retiring from it.

What Justin Jackson actually said

Do you hold this korrent?Do you also believe this?

Shared subject first, then similar wording. They may agree or disagree.