A similar sale occurred about a month ago, and it's back again! Some very elegant watches, with RRP (according to the OZSALE site) usually $100+, now for under $20. I missed out last time, but got in quick this time. Delivery to Melbourne from the US is about $10 for one item and takes 7-21 days. Delivery is cheaper when you purchase multiple items, only about $1 on top of the original delivery fee.
I also just browsed around online very generally, and found similar O2 watches for $80 (please see link below).
au.shopping: http://au.shopping.com/o2-watch/products?CLT=SCH&KW=o2+watch
Or you can purchase one watch, checkout, then order the second watch with free delivery. :)