Patent ID: 8464943

Claim:
A central portal system supporting a plurality of buyers and a plurality of independent sellers, the central portal system comprising: a first central service that couples with a plurality of independent sales portals of the plurality of independent sellers to receive first data and send second data, both the first data and the second data being associated with a plurality of competing advertisement posts; the first central service interacting with a central database to store the first data, the first central service receiving from a first of the plurality of independent sales portals of a first of the plurality of independent sellers via a program interface at least a portion of the first data constructed from contents of a first database of the first of the plurality of independent sellers, the program interface at least in part providing a common mapping interface between the central database and the first database to support data synchronization; a second central service that couples with a plurality of buyer computers of the plurality of buyers to offer competitive advertising based on selections from the plurality of competing advertisement posts; and the second central service vectoring a first of the plurality of buyer computers to the first of the plurality of independent sales portals and assessing a fee for performing the vectoring.