Its always a good idea to get the info in a central location.
Based on a similar idea, I've started a entry on the Wiki about where you can buy E-book readers worldwide.
I've just started , so its still quiet bare, and I've mainly got information on the UK.
If you're willing to fill in the Information on Australia, it'll become populated faster.
https://wiki.mobileread.com/wiki/Wher..._eBook_Devices