Abstract: Enables self-serving consumer to indicate personal element of demand for a particular product so they are alerted to modified supply (promotion) for the product. Potential buyers use input in the form of MMS protocol or SMS protocol to communicate a proprietary code (identifying the store of product observation and a product of interest) to a communications host. The store and product information, together with a return address for responsive communications concerning the product, is stored in a third-party database. A seller interested in demand in their establishment could access the database and retrieve aggregate buyer-segmented product demand information for the consumer they target. The seller could effectively design incentive schemes and communicate promotional information by SMS protocol to the potential buyer via the communications host.