Once your product is sold then you can easily mark it as sold. If you want to mark your listing as sold then you have to click on the Market from your Facebook feed. Then you have to select “Your Account” from the left menu. Now you will see all your listings of yours. Now select the listing that you want to mark and then click “Mark As Sold” next to the listing. Once you mark the listing as sold, the buyer will get a notification and be able to rate you as a seller.