Anaconda is currently having a sale on bicycle locks. One that stands out is the Abus U-Bolt Mini, priced at $52. Next cheapest is $59 @ Pushys and Cell Bikes.
Upon posting this I just realised that you may be able to combine this with the $10 voucher posted earlier…
https://www.ozbargain.com.au/node/163583
Enjoy yourselves!
Looks like $53 shipped to nsw.
Subtotal $52.49
Promo Code Savings -$10.00 ( OCT3ANA14 )
Delivery * $10.60
Total $53.09
Includes GST
* Estimated delivery cost