I suggest that we make "Set boxes" in which we could upload our "Art" image sets.

These sets could then easily be activated or deactivated in one click, allowing people to own, and easily use more than one set. These "Set boxes" would make trading "Art" a breeze, because a seller could transfer an entire art set to his buyer as easily as any other item. This would eventually make it possible to trade sets in the "automated" Market page, once a few more functions would be implemented there.