Strictly speaking, of course, "marginal value" pertains to subjective ordinal rankings on the value scale of a single individual, while price refers to a cardinal quantity of money. The price of the good "approaches" its marginal (money) value to buyers in the following sense: the subjective utility of the money price is lower than the marginal utility of a unit of the good to all buyers, but any further increase in that price would cause its subjective utility to exceed the marginal utility of the good for at least some buyers.