I'm a recurring Lik-Sang customer living in the U.S. I've mostly bought Japanese magazines and small Dreamcast accessories. On average, my orders arrive 2 full weeks after I receive the email announcing it's been shipped -- all this considering it must travel from Hong Kong, across the Pacific, to California. From Hong Kong to Australia, I'd imagine would have a shorter shipping time, but an actual Australian Liksang customer would give you a better estimate.
Standard Air Mail shipping for 1 magazine costs me US$4.
Liksang usually sells new JPN or US games for roughly US$60, while it costs US$50 for people in the States. A $10 increase.
But since you want Resi4, I guess you're in luck.
Resi4 LiksangLiksang's currently offering the game (pre-order) with Free shipping worldwide, for a limited time, so your TOTAL cost will only be about US$60.
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As an alternative, Play-asia.com is offering Resi4 for just US$50, and US$3 for worldwide shipping. Play-Asia is also based in Hong Kong, i think, and this might ultimately be cheaper. Another good store.
Resi 4 Play Asia