You will be charged for the shipping. Rates vary according to zones and weight of your order.
The shipping cost will automatically be calculated for you once you select the shipping zone in your 'Cart' page. The total amount reflected will be the sum of your purchases together with the shipping costs.
Assuming that you want to purchase an item which costs US$100 and choose to have it shipped to Australia, the shipping price will be shown as US$29.80 (also depends on the weight).
Thus the final price you need to pay upon check out would be US$100 + US$29.80.
However, for custom items, the shipping and handling costs are already included in the price.