> I sincerely don't understand if this was a jab towards me on some kind of "invisible hand of the market" argument or the complete opposite. Between those two

> I sincerely don't understand if this was a jab towards me on some kind of "invisible hand of the market" argument or the complete opposite. Between those two, it was the former. What I mean is that I don't see that people are obliged (_i.e._ should) trade with each other at all. If they nevertheless choose to do so, I don't see that every good or service should cost the same, or have a maximum difference in price.