Prices and Exchange Rates If the identical product or service can be sold in two different markets,and no restrictions exist on the sale or transportation costs of moving the product between markets,the products price should be the same in both markets. This is called the law ofone price 制计价贸易大孝Prices and Exchange Rates „ If the identical product or service can be sold in two different markets, and no restrictions exist on the sale or transportation costs of moving the product between markets, the products price should be the same in both markets. „ This is called the law of one price