Except it&#x27;s a core concept of economics and is done everyday for basically everything that can be purchased.<p>In your head you have a maximum you will pay for some good or service based on the marginal value it would give you compared to the marginal cost. The goal for a seller is to find this number for each customer and sell to them at that price. In such a case, both parties are better off in total even though there may be a very wide delta between COGS and income.<p>[1]<a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Marginal_utility" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Marginal_utility</a>