Extra25
Get 25% extra discount on already discounted items at the iconic. This website does free shipping over $50 and free returns. I've used them a few times and the returns process is great.
I think there is also an aussie cashback scheme.
Careful on orders over (?$200 ?$400) you may be charged gst and duty.
None of the Aussie cash back websites can pay into PayPal or nz bank accounts. Airpoint Small offers 1% back in air points.