Any listings you have that are not for sale, such as share groups posts or promotional posts, should be listed under the Not For Sale category while you are listing. By using “NFS (not for sale)” for this type of content, you’ll be helping shoppers more easily discover your listings that ARE for sale while making your alternative content more easily found through filtering. You can find “NFS” when you go into the Category dropdown upon adding or editing a listing. Listings that are not for sale but are not listed under this category are subject to deletion without notice. 

Once you tap on Not For Sale a subcategory will be available with the same name. You will need to tap on this as well. On some devices, it won't be visible unless you scroll up after tapping on Not For Sale.