No System Can Account for Itself, So What's the Price of Money?

There are several ways to refute the idea that the price for which something is exchanged is the sole measure of its economic value. Try this: Human beings have lived most of their history without money. The invention of money has been a great lubricant for economic activity. The existence of money has value, therefore, for society that is exterior to the money system. What is the price--how much would you pay--for entry to the money system?