Please check images before you commit to buying.

I will combine shipping charges if you buy multiple items.

[For international buyers]
I won't send items directly overseas. I use the eBay international shipping program which allows me to send items just to the eBay international shipping hub in the U.S.and eBay will handle the international portion of shipping.  So I can't even send an invoice directly to the international buyers if the buyer wants to combine shipping.
After you pay all items separately, I will refund the difference between the actual combined shipping charges and the amount you paid. But this is only for the domestic portion of the shipping charges. I don't know if eBay can refund the difference for the international part of the charges.
If you want to avoid extra shipping charges of the international portion. Simply buy all items and then let me know that you want to cancel all items. I will cancel all and recreate a single listing which includes all items you canceled for you. Then you can buy it again. This makes things simple and you will get the lowest shipping charges.