Amazon now has a store in Australia - amazon.com.au
AU $ is used

I’ve added the old Amazon USA back in. It should show up as “Amazon US (AU)”.
Let me know how that works for you
Rachel
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Leonie commented
I stand corrected, it just takes a couple of minutes to come through. You are a genius!
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Leonie commented
Thankyou for looking at this, so far as I am aware we fall through the cracks for all other price trackers and have no way of tracking Amazon prices. Amazon AU seems to be a translation of Amazon US prices as they apply to Australians. I can't seem to see Amazon Australia in the list of books retrieved though. Example is Marley & Me by John Grogan, Apple and Kobo prices are retrieved but not Amazon AU.
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Stephen Rees-Carter commented
Would this work have broken support for Australian users on the Amazon.com store? My wishlist has disappeared from Luzme again...
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Leonie commented
It's not just that the price is in AUD, our availability and pricing is often totally different to the amazon.com data set you have on here, rendering this site frustratingly out of reach for us! E.g today Room by Emma Donahue is the US $2.99 daily deal but we get to pay $A11.99.