The auctions are in Australia, so the prices are $AUD. There is free postage within Australia, but people in NZ may need to pay more to get it flown across the Tasman.
From the site:
The auctions will be held during the first week of December.
The auctions will preview for 48 hours before going live on Wednesday, 1st December when you will be able to bid.
They will all close for bidding on Friday, 3rd December with the first item ending at 5pm (AEST Victorian Daylight Savings Time).
Closing times are staggered at 10-minute intervals, with the last auction closing at 8.40pm.
Please familiarise yourself with the ending times of any items you may be interested in.
As usual all monies raised go to the Kate Buntine Foundation, which supports young children who have been diagnosed with Type I Juvenile Diabetes.