The sales commission rates I see here are way too high for the agent, even on the 10% rate.
My friend who owns a car surplus shop gives only 10k maximum to anyone who can refer to him a successful sale. Even for sports car variants in his line-up, 10k is max na. Understandably, laway lang naman kasi ang puhunan ng agent.
My answer to the thread title is: NO. This is not how car "agents" work. I think that this is how they try to con you.