Abstract: A networked computer arrangement and method in which a manufacturer or service provider may communicate to a plurality of traders the items, including goods and/or services, which may be available for purchase, the quantities of those available items, and any other conditions to be met for the purchase of the available items. Traders may apply guest bidder profiles or entitlement schema to the available goods lists to produce offerings for a plurality of guest brokers. Only bid-relevant product information is presented to each guest broker as needed in order to protect the offering party's overall position on the offered good(s). Guest broker profiles or entitlement schema may be based on perspective contractual arrangements between potential brokers, traders, and a manufacturer or service provider. Offerings are presented to the guest brokers, who are restricted from participating in the bidding process.