IMO The listing agent is hired to market the property, not necessarily personally bring buyers. I also believe "Agency Exclusives" hurt Sellers. As an agent (should this friend be out of their contract with the other agent), you need to educate the Seller about this. It is likely the Seller has an arrangement that if he gets a Dual Agent, he'll pay less commission. Dual commission arrangements are usually ugly. If the Seller won't listen to you, run (not walk) away.