″‘Value’ has no meaning other than in relationship to living beings. The value of a thing is always relative to a particular person, is completely personal and different in quantity for each living human — ‘market value’ is a fiction, merely a rough guess at the average of personal values, all of which must be quantitatively different or trade would be impossible. … This very personal relationship, “value”, has two factors for a human being: first, what he can do with a thing, its use to him… and second, what he must do to get it, its cost to him.”