Abstract: A system and method for enabling sellers to have an automatically created advertising message placed into a pending presentation opportunity such as an email or web page targeted to a known buyer based on matching seller specific parameters to known buyer attributes. The system also creates a promotional offer to be inserted with each advertising message. A computer program matches the seller campaign to the pending presentation opportunity record. Then, a further computer program creates the eligible seller's advertising messages by polling their market venue for their then active listings and appending them to the pending presentation opportunity record. A further computer program on the system creates and assigns promotional offers to each seller advertising message by executing instructions predetermined by the seller. Once the messages and promotions are created, the system composes and posts the final presentation for access by the buyer.