I think to buy anything less than 100 nzd made in china ebay is better than amazon. Amazon charge shipping fee depends on the weight around 10 nzd. Some chinese seller in ebay offers free shipping to nz which is great.
I bought a xiaomi router from ebay at nzd51 and works great. The delivery time is around two weeks which is very fast.
This way I can enjoy the fresh air in Auckland and pleasure of buying reasonable price goods with nz dollar purchasing power in China.