Corsair Vengeance RGB PRO 64GB (2x32gb) DDR4-3200 Mhz (Black): US$274.99 (~NZ$509 Shipped) @ Amazon US

According to Camelx3, could be lowest USD price for the 64gb (2x32) since February of this year ($289.99).

Model: CMW64GX4M2E3200C16
At Computer Lounge for $699
At Paradigm PC for $614.08
or the 3600 MHz version from PB Tech for $599
- odd though that PB Tech has the same model number as the above. Possible mistake on their end.

Price breakdown
NZ $424.66 + $18.36 shipping (to Hamilton) + $66.45 GST = $509.47 (12/08/2020 9:44PM)
Amazon: 1 USD = 1.544279 NZD