If you use the "My Photos" and click on edit, then click on "display" do the Thumbnails, then do the "From This Network". Then save.

It will display photos from this Thrifty Vault Ning network.

If you go to the bottom of "My photos" and click on "Add Photos", you can add your item you want to sell and it will show up, on your page and also on others who have done this.

It is like cross promoting!