Selling with one agent on both sides cost home sellers $1.49 billion over three years

New Zillow data finds sellers consistently lose when their home is hidden from buyers or when one agent holds both sides of the deal Home sellers in same-agent dual agency transactions — where one agent represented both buyer and seller — lost a combined $1.49 billion over three years, according to a new Zillow analysis. Home sellers who listed off the MLS lost a combined $1.36 billion over three years, typically selling for 1.3% less than sellers who listed publicly.