17. A method to facilitate network-based commerce, the method including: generating a map file storing a first plurality of records, the first plurality of records respectively storing summarizing information for a first plurality of offerings, the first plurality of offerings including a second plurality of offerings, the first plurality of records including a second plurality of records, the second plurality of records respectively storing summarizing information for the second plurality of offerings, the second plurality of records grouped to facilitate a reduction in processing to retrieve the second plurality of records, the generating being performed by a server machine of a network-based commerce facility; retrieving the second plurality of records from the map file responsive to receiving a request from a user, the second plurality of records respectively associated with the second plurality of offerings including an offering, the retrieving including determining that the offering is available in a particular geographic region, the offering being presented for sale via the network-based commerce facility; and displaying information concerning the offering to a user associated with the particular geographic region, the displaying of the information concerning the offering including displaying a listing currency in conjunction with a native currency.
17. A method to facilitate network-based commerce, the method including: generating a map file storing a first plurality of records, the first plurality of records respectively storing summarizing information for a first plurality of offerings, the first plurality of offerings including a second plurality of offerings, the first plurality of records including a second plurality of records, the second plurality of records respectively storing summarizing information for the second plurality of offerings, the second plurality of records grouped to facilitate a reduction in processing to retrieve the second plurality of records, the generating being performed by a server machine of a network-based commerce facility; retrieving the second plurality of records from the map file responsive to receiving a request from a user, the second plurality of records respectively associated with the second plurality of offerings including an offering, the retrieving including determining that the offering is available in a particular geographic region, the offering being presented for sale via the network-based commerce facility; and displaying information concerning the offering to a user associated with the particular geographic region, the displaying of the information concerning the offering including displaying a listing currency in conjunction with a native currency. 18. The method of claim 17 wherein the determining the availability of the offering in the particular geographic region includes utilizing offering listing characteristics.