A networked computer arrangement and method for preparing entitled offerings to prospective brokers, buyers and bidders, by establishing an entitlement schema in an offering and bid collection computer system based on a contractual arrangement between the brokers, traders, and offeror; preparing an entitled offering through filtering the a master list according to the broker schema to include only information for items to which each broker is allowed to purchase: and, subsequently. but prior to receiving any bids, presenting via a user interface the entitled offerings to the prospective brokers such that each broker may review entitled offerings containing information regarding items being offered for sale on which the broker is entitled to bid, but are not allowed to view information regarding items to which each broker is not entitled to purchase.