Artwork is not a physical unit. To sell 5 units instead of 1 is stupid. You can do INFINITE units of each artwork. And price of each unit is infinitely low - it's about a zero. One picture can go to every person in the world for free. Value is not in the pictures, AUTOR is valuable. In digital world we mus step off the item world ways. Do not buy items from creator - there no "items" in digital world, how you can buy it? You just getting a copy, and creator holds his copy still. We must directly reward creators for productivity, not buy copies of his art from his slaving copyright holder. That's the way of digital world: artwork is free, but artist is valued on the base of his artwork!