How much

[Xanzurth]

Man you guys are all so lucky. Here (in Australia) a booster is 6 bucks give or take.
And the rest goes up from there.
Fat packs at $60, booster boxes at $160.

Have a look at a site called Good Games in Sydney if you wanna see comparable prices. (One of the official MtG sites in Australia)
Pretty much every plainswalker is over $30 some of the swords were fetching $40-60 and primeval Titan sat at around $50-60 until right now when he is rotating (dropped to $25)
It's a sellers market over here. As if the mark up wasn't crazy already. (Oh and our dollar is currently fetching 1.04US$)

You guys are eating all the shipping cost. What bullshit. Hit eBay and buy your stuff cheaper. But then again I don't know how much it's gonna cost to ship to you.

[Phat Max]

Unless you buy basically pallets of booster cases, you're looking at $85 per booster box straight from Wizards, iirc