Postage is a b*tch to figure out here, but rest assure, it's calculated at base weight rate/parcel type for Australia.
I'm happy to throw in a character sketch of your choice to negate any dramas in extra cost to you on multiple comic orders.
Something like this:
http://4.bp.blogspot.com/--GX60z8g6Wk/UMrKQEJzmVI/AAAAAAAAEiI/VSect3kWQaE/s1600/sl3.jpg
With multiple pack orders or poster orders, postage is a little weird, so any over calculating by the website will get refunded in the form of a money order with the books, or direct bank transfer/paypal if you email me.
Sound fair?
Contact me with queries via the tab :D