Sub-agents are agents of the listing broker other than the listing agent and are assigned by the listing broker to help an unrepresented buyer. Sub-agents solely represent the seller as their fiduciary.  Some clear disadvantages exist for the buyer under sub-agency. There is no obligation to obtain the best price or terms for the buyer, since the broker, as sub-agent, was obligated to obtain the best terms for the seller, generally someone whom the sub-agent had never met and with whom no direct business relationship existed. It is important the sub-agent makes it clear to the Buyer what his role is to avoid any confusion. Many states, notably Florida and Colorado, have abolished sub-agency.