This was at Coles Bendigo McIvor in that cheapy little electronics part they have. Only class 4, but still very cheap. Next cheapest I can find online is around $6 delivered for a class 2 sandisk. Even crappy Chinese brand ones seem to be $5 on eBay. Videopro are still selling these for $8.80.
Link to Sony page: http://www.sony.com.au/product/sf-2n1
Good find but not the cheapest for $/GB.
see this better deal.
http://www.ozbargain.com.au/node/67154