Current going rate on flights out of Auckland is about $1745 return. However there's a special deal flying to North America return for $950 AUD out of the Australian east coast capitals with promo code NAM300 - http://www.airnewzealand.com.au/north-america-sale. There's sale prices to South America with promo code SAM300 as well.

Along with special prices to Australia, you can book a return flight into Australia via airnewzealand.co.nz, then another return flight out of Australia and to America via Auckland via airnewzealand.com.au, and you'll get it cheaper than if you flew directly out of Auckland (as well as gathering a stack of status credits and airpoints dollars!)

(Note that this only works while the AUD and NZD are similar. If they drift apart again, tough luck unfortunately).