Cheapest deal I could find seeing as though Amazon doesn't ship to Australia.
Most sellers on eBay US charge $30-40 for shipping, plus there is currently only one listed on eBay AU for $130.
$49.99 USD + $12.26 shipping = $62.25 USD, converted to approx AUD = $81.75 AUD (currency rates change frequently)
At checkout, choose shipping as 'DHL Saver - $12.26' as it's the cheapest delivery option (still 3-5 delivery which is fast). If you want it delivered faster, there's other delivery options too.
Thanks to systmworks for the tip - there's a cheaper option for delivery if you buy 2, US$20 vs $12 for a single one. So you save $2 per device ordering a pair
Link for White colour (https://www.bhphotovideo.com/c/product/1282299-REG/amazon_b0…)
How to set up Amazon Echo in Australia (https://devdiner.com/internet-of-things/how-do-i-set-up-an-a…)
27/10/2016 - UPDATE
I have recently got in touch with B&H customer service regarding pre-orders, and was told that they're completely out of stock so the next batch will be in stock on 11/11/2016
The previous date was 05/11 but sadly got pushed ahead.
This might be a huge deal-breaker for some people, despite how cheap they're selling it for compared to other sites. However, I am now thinking of cancelling my pre-order and looking to buy elsewhere as I don't really want to wait that long…
Well i noticed it was Nov 6 when i first looked at this post .. i dont think it has changed … when you consider Amazon will release these on October 20 .. so by the time the B&H order is made .. shipped to B&H .. go through their processing etc .. it will be a couple of weeks later than the release date