Is this legal tender in New Zealand?
Denomination: $2 NZD
Yes. NO.Niue is its own sovereign nation and as such it (the item being offered above) is a notional currency given that it purports to being silver bullion.
https://www.europeanmint.com/2021-1oz-niue-bitcoin-silver-coin/New Zealand does not have its own Royal Mint and as such any company calling itself "New Zealand Mint" is not an official Government mint - it's just a company churning out tokens with a nominal denomination via a Pacific Island nation. (Like the Franklin Mint, or Downies is Australia)...
As you can see on the website, the "coin" does not say New Zealand, rather, it says Niue.
https://www.nzmint.com/New Zealand Mint has been minting legal tender collectible coins, gold bullion and medallions for more than five decades. As New Zealand's only precious metal mint and one of the first world mints to adopt the .9999 standard for gold coin purity, New Zealand Mint prides itself on high quality design and production work.
We are located at New Zealand Mint House, Corner of Greys Avenue and Mayoral Drive, next to Myers Park. Please note, we are closed on New Zealand Public Holidays.
Level 1, 48 Greys Avenue
Auckland 1010
New Zealand
Office Hours:
Mon - Fri / 9:00am to 4:30pm (NZST)
The emphasis being on that the coins are
legal tender collectible coinsIts resale value will be tied to its bullion content.