Disclosed is an Expected Value Payment Method for the purpose of reducing the expected per unit costs incurred in paying and/or receiving a given amount of a commodity. An Expected Value Payment Method uses a random number supplier to decide bets that can reduce expected per unit costs in two ways. First, expected per unit costs can be reduced for the payer and/or receiver of a commodity by giving the receiver a chance to win a greater amount of the commodity than a given amount, the greater amount having a lower per unit cost than the given amount which was originally to be paid and received. Second, in special situations, certain businesses can offer customers who bet to win a given amount of a commodity a better expected price for that amount than the price offered to customers paying conventionally for that same amount. Also disclosed are Expected Value Payment Execution Methods and Systems that make an Expected Value Payment Method practical in the marketplace and methods and systems for preventing cheating in expected value payment bets.