So I missed out on JB Hifi @ ~$55 and DSE is currently sold out at $69.
I don't mind which region it is from as I only want to play the single player campaign and I have no intention of selling it.
The cheapest I have found a CD-key is here ( http://www.hotcdkey.com/Starcraft-II.html ) for US$51. Is hotcdkey.com even reputable? Are there any cheaper?
I went to Game, Big W, Dicksmith, and JB Hi-Fi on Saturday and they were all sold out, so I went to EB Games and they were selling it for $100. I decided to ask them to price match Dicksmith even though were sold out and apparently Dicksmith told them they were selling it for $59.95, so I got it for that much. All the stores were in the same shopping centre
Here's the receipt, its not that good quality.
http://img831.imageshack.us/img831/6733/image2jp.jpg
PS: Playing multiplayer online is much more fun.