Shipping is on a more-or-less per-item basis and is charged by the printers. It runs:
For US: $4 for the first item and $1.50 for each additional item. If you buy 5 or more items, we'll pick up the costs of shipping.
For the rest of the world: $7.50 for the first item and $6 for each additional item. If you buy 6 or more items, we handle the shipping for you.