1. A computer-implemented method comprising: determining a current location of a mobile device of a real estate buyer using a location sensor of the mobile device; identifying a nearby plurality of residents having resident profiles within a range of the current location, wherein the resident profiles include resident items respectively describing the plurality of residents; comparing a buyer profile associated with the real estate buyer to the plurality of resident profiles, wherein the buyer profile includes buyer items describing the real estate buyer; identifying, based on the comparison, a correlated resident profile among the nearby plurality of residents, the correlated resident profile correlating with a buyer profile; determining realty available proximate to a resident address associated with the correlated resident profile; transmitting an alert to the mobile device of the real estate buyer indicating the realty available; and causing presentation of the alert via the mobile device of the real estate buyer, wherein the buyer items and the resident items include demographic factors, and wherein the demographic factors include an age, a profession, an employer, a marital status, a salary range, and a family status.