A system for presenting properties includes: a server, coupled to client devices via the internet, the server including: a unification module, that periodically accesses data sources for listings, where the data sources include on-market sources and off-market sources, and that retrieves the listings from the sources, converts the listings to a common format, and stores the listings in the common format, and that detects deficiencies in the listings that cannot be resolved by accessing public data sources; and an intelligence module, that receives a request from the unification module for data that can resolve the deficiencies, and that accesses an external entities database to select external entities that can provide the data, and that automatically generates requests to the external entities to provide the data, and that automatically receives the data to enable the unification module to update a parcel record in a parcel database associated with the deficiencies.