Samsung 850 EVO 1tb NZD389
https://www.dicksmith.co.nz/dn/buy/samsung-850-evo-1tb-ssd-mz-75e1t0b/
Samsung 960 Pro 512gb NZD389
https://www.dicksmith.co.nz/dn/buy/samsung-960-pro-512gb-ssd-mz-v6p512bw/
I doubt there will be any NZ Local seller can do this price.
Yes they are shipping from overseas but it is not over NZD400 so you shouldn't pay tax. Their website said "Tax Free" during checkout but not sure if they will cover the tax if the customs give you a hard time.