White Dwarf 243 (UK Edition)
I have lots of different listings, but at least as far as White Dwarf issues are concerned I can predict roughly what postage will be if you want to buy multiple copies and combine postage:
1-3 issues will cost $10.60 postage
4-9 or 10 issues will cost $14.50 postage (it will depend as some issues are thicker than others)