“The most fundamental reason why there is no such thing as an objective or “real” value is that there would be no rational basis for economic transactions if there were. When you pay a dollar for a newspaper, obviously the only reason you do so is that the newspaper is more valuable to you than the dollar is.
At the same time, the only reason people are willing to sell the newspaper is that a dollar is more valuable to them than the newspaper is. If there were any such thing as a “real” or objective value of a newspaper—or anything else—neither the buyer nor the seller would benefit from making a transaction at a price equal to that objective value, since what would be acquired would be of no greater value than what was given up. In that case, why bother to make the transaction in the first place?”