My software calculates shipping for US customers only. Postcards (any number) ship for $2. Posters (any number) shop for $9. Orders over $100 ship free.
INTERNATIONAL CUSTOMERS: You can checkout normally, but the shipping charges are for US addresses only. International shipping is more costly, so I will bill you for the difference (exact amount - no handling or packing fees). Or you can email me in advance to find out the shipping cost. Shipping to the UK is $23.50 for up to ten posters.
I have lots of experience packing and shipping posters safely.