Acronis True Image 11 Home - an excellent full backup/restore / imaging solution - for US$10.
"Acronis True Image 11 Home provides the maximum flexibility to ensure you are adequately protected and can recover from unforeseen events such as viruses, unstable software downloads, and hard drive failures. Create an exact copy of your PC for a full backup or backup only your important data — your choice."
The link states "the offer ends this week" however I couldn't see any dates, so it's possible it'll still be available after the week has ended. To be safe, I set the expiry date to Sunday.
Sourced from Whirlpool: http://forums.whirlpool.net.au/forum-replies.cfm?t=1050828
More info on the product can be found here: http://www.acronis.com.au/homecomputing/products/trueimage/
EDIT 16/9: still appears to be active, so upped expiry date.
You can get an extra 10% off (down to $8.99) if you click on the "Buy Now for $9.99" link on the page, then press the "back" button on your browser. You'll get a pop-up page saying:
"If you mistakenly left our store while trying to purchase, you may resume your purchase and receive a 10% discount by clicking on the Check Out button below."
Press the check out button and you get an extra 10%/$1 off the already low price. I've just made a purchase and it works.
Note that the disclaimer on the linked page says "For this offer you cannot get a free upgrade to the new version if it comes out within 30 days of your purchase.", so perhaps the sale means that a new version of ATI is coming out soon …