Why is the MLS the Best Source of Listings?
The MLS is typically the best source of listings because it is the most complete source of listings, and the listings are most up to date. In most markets, agents and brokers must put their listings on the MLS before they appear on any other medium, and they are required to enter details about the property, so the MLS tends to have the most complete listings. Almost all other listing services either get their data from the MLS, or aggregate their data from multiple, incomplete sources. Thus, almost every other source of listings is either less up to date than the original source MLS system, or has only a subset of listings.
