A method and apparatus for proximity service discovery are disclosed. In one embodiment, the method comprises providing one or more expressions from a market server to at least one wireless broadcasting device for broadcasting over one or more wireless channels, each of the one or more expressions related to different marketplace items, receiving, at the market server, one or more requests from one or more wireless devices for information to identify items being offered in marketplace that match items the one or more wireless devices are attempting to obtain, sending expressions to at least one or more wireless devices associated for matching the relevant broadcast signals associated with items the one or more wireless devices are attempting to obtain, and providing, by the marketing server, data notification channels for direct device-to-device data notification over at least one wireless channel to facilitate information exchange between the at least one wireless broadcasting device and the one or more wireless devices attempting to obtain items being offered by the at least one wireless broadcasting device.