Nearly as good as the Amazon deal from a few weeks back! It's a few bucks more expensive and isn't USB3.0, but it is Australian stock.
Pricematch @ Officeworks for $151.05 (thanks to BertTom and Tessai): http://www.officeworks.com.au/retail/products/Technology/Dat…
Disassembling guide (thanks to Kuric, we aren't responsible if you botch it!): http://bychaw.blogspot.com.au/2011/02/how-to-take-apart-your…
UPDATE: Looks like OW has change their price to match JB's. No more pricematching :(.
Not sure if you should get a WD or Seagate?
WD - Average of 4 stars with 13% 1 star ratings (1,431 reviews): http://www.amazon.com/gp/product/B004SH5VQ4/ref=s9_simh_gw_p…
Seagate - Average of 3 stars with 31% 1 star ratings (436 reviews): www.amazon.com/SEAGATE-Expansion-Desktop-External-STAY300010…
Cheaper than a bare 3TB drive. Don't forget price matching at Officeworks if you're not local to a JB.