A method for use in marketing includes detecting, at a remote computer, product purchase information of a plurality of retail stores. The product purchase information includes price information. The remote computer is located remote from the retail store. The method also includes receiving, at the remote computer, a shopping list of a customer. The shopping list includes at least one item. In response to receiving the shopping list, communication to the customer of price information associated with at least one item on the shopping list for the plurality of retail stores is initiated by the remote computer.