So on the sale of your $300,000 house, her personal take of the $18,000 commission is $4,500. Still not bad, you say. But what if the house was worth more than $300,000? What if, with a little more effort and patience, she could have sold it for $310,000? After the commission, that puts an additional $9,400 in your pocket. Yet the agent's additional share - her personal 1.5 percent - is a mere $150. So maybe your incentives aren't aligned after all. Is the agent willing to put out all that extra time and energy for just $150?