3rd party portals are slow to show new listings. When a property is listed for sale, it hits the local MLS and my website in a matter of minutes. But it can take as long as 9 days for that same listing to populate to nationally syndicated sites. Also, those other sites often show properties that are no longer available on the market and display only a fraction of the listings that are actually available.
Not to mention, many of the property values listed are way off. Real Estate is a local business, so why use a portal that isn’t?