How to Sell Your House Without a Realtor and utilizing Internet Marketing… Can I Really Sell My House Without a Realtor? The National Association of Realtors says…NO WAY! They do control the greatest marketing tool known as the Multiple Listing Service which gives all Realtor members access to your listing information. It’s pretty huge considering there are usually several thousand agents in each city and they are usually working with 10 or 15 potential buyers! WELL..at least they were …