Seller Pruitt signed an exclusive righttosell listing with Broker Cook. Open listing: In this type of agreement, sellers have the right to use as many brokers as they want.This guide will help you to understand the changes and the proper way to fill out the forms. Everything you need to know to represent your seller! Seller appoints Broker as Seller's sole and exclusive real estate agent and grants to Broker the exclusive right to sell the Property. 2. This form recommended and approved for, but not restricted to use by, the members of the Pennsylvania Association of Realtors® (PAR).