While I like the idea of being able to sell individual cards, I do not like that it lands on the GCU page where the left side is full of other cards in that catagory.  Nothing against other artists, but if I am promoting my cards, I want the person I am directing to GCU to see only MY cards.  I would love to see this feature land in the artists store, not the general GCU page.  Also, it would be nice for it to open in a new window, so as to not redirect the customer off of the original website completely.