When people have done studies, they have found real estate agents on average sell their own homes for 10% more than anyone else. Because think about it. If their commission is 3%, are they really gonna fight to sell for $350,000 in a week if they can sell it for $300,000 today and get a new client, when the difference to them is $1,500?

If they can get even one extra client per year for the other $9,000, it's much more worth it to do that than to hold out for a better offer.