I've seen some sites attempt to create these kinds of services, but they have to build it up, which takes forever. We already had this massive network.

What sets Windows Live Expo apart is that people can set their own search parameters for goods and services. They can define their own marketplace universe.

Every listing in the system is geo-coded by ZIP code at the very least. We add integrated maps from Live Local. The feedback we get is that it is fantastic for garage sales.

We will know a lot about the seller and the buyer, like their location, and we know by keywords what item they are interested in.