DO NOT put $0 or even just 0 in the box. If you do, the item will be for sale but you won't make any money on it. Leave it completely blank.
The description for pricing prints has information about not putting prices in for sizes you don't want to sell, but it's not obvious that this applies to everything on the site. It might be helpful to include that for every other item, too, just in case people look first at something besides prints.
