I was looking to purchase one of these and stumbled up on this on the Medibank site. If you are a Medibank member you get 25% off Fitbit purchases. The Aria 2 scale comes in at $149 and I can't seem to find anyone better than that.
Also, Iconics come in at $337 - I jumped on a deal back in Nov on Good Guys ebay and it came in at $364 which I thought was a good price.
All you need to do is authenticate with your medibank member number and it will take you to a dedicated shopping cart with the discount applied.
[Edit - sorry just notice shipping is included for $9 for the scale - still not bad]
[Edit2 - yes sorry changed to Ionic]
You mean Ionic?