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.