Hallenstein Brothers are running a deal - 3 polos for $NZ30.
Also there's a 20% off code active until the end of January posted previously at http://www.ozbargain.com.au/node/89605 by http://www.ozbargain.com.au/user/89716/nodes — use "JAN13SALE" at checkout to get 20% off.
With 20% off, that's 3 polos for $NZ24 and according to Google:
24 New Zealand Dollar equals 19.18 Australian Dollar
So $20 for 3 polos give or take after credit card/conversion fees.
Shipping Costs?