在 ezydvd.com.au 辦團購 is not good because the shipping is by the number of DVDs:
International Orders
South/Pacific
1 AU$3.50
2 AU$6.50
3 AU$14.50 includes registration and insurance
4 AU$17.00 includes registration and insurance
5 AU$19.50 includes registration and insurance
Pre-orders AU$3.00 per disc (Please refer to the above charges for orders containing 3 discs or more)

Please allow up to 14 working days for delivery.

So it would be better if you just order 1 or 2