Stack Social is offering a PIA 2 year VPN plan for $50.96 USD with code VPN15. That is roughly $75 NZD at market rate.
Hasn't been this price for a couple of years. Personally I use Getflix (lifetime subscription) but have heard good things about PIA.
via LoopyLou on OzBargain(ozbargain.com.au)
New users only, unfortunately. I've used them for four or five years and have no complaints at all.