A One Time Showing Agreement is a commission agreement signed between a buyer's agent and a seller for specific named buyers. This Agreement of Purchase and Sale (this "Agreement") is made as of this ___ day of.The Northern Virginia Association of Realtors provides a full library of free forms, which are reviewed and updated regularly, for all members. This Agreement of Purchase and Sale (this "Agreement") is made as of this ____ day of. To securely and accurately complete the One Time Showing Agreement and ensure all legal bases are covered, click the button below. The housing market in Fairfax is expected to remain strong in the coming months, making it an ideal time to list your property. In the form of a check or promissory note. Fairfax Virginia For Sale By Owner - FSBO. Watch the orientation video, fill out the form. Signing a mandatory participant agreement to climb with us couldn't be easier.