1. A system, comprising: one or more servers to execute: business rule definition logic to define at least one business rule; and offering creation logic to dynamically create a plurality of different listings on a network-based sales system, the plurality of listings to respectively offer a lot that includes at least one item, the offering creation logic to optimize a financial return for the plurality of listings based on the at least one business rule that is operatively used to adjust offering values included in the respective listings, the offering creation logic is to adjust a first offering value in a first listing of the plurality of listings and a second offering value in a second listing of the plurality of listings, the offering creation logic is to adjust the second offering value in the second listing based on sales results of the first listing.