Rocky Road 267$ USD for the IFS locker #1611. (381$ NZD so under GST amount for customs) $70 Freight to Auckland. So approx $480 NZD to my door
I think you will find that the GST is calculated on the item cost plus the freight cost as the freight is a service. Plus you will need to add credit card transaction fee which for ANZ is 2.5% which with the current exchange rate gives a total more like $550.
Not sure but you may have to also pay an import fee, may pay to check with customs. fee was $28 for me.
Cheers
Tim