Certified Buyer Representative is a by REALTOR® Boards and Associations throughout the United States. REALTORS® with the CBR designation are taught the street skills necessary to both help buyers find their desired property and to help them negotiate for that property in a non-adversarial manner. a course sponsored by REALTOR® Boards and Associations throughout the United States. REALTORS® with the CBR designation are taught the street skills necessary to both help buyers find their desired property and to help them negotiate for that property in a non-adversarial manner. This designation may be earned by completing 3 consecutive days of intensive buyer agency training.