It would depend on the year, denomination and type of coin.
There was no New Zealand 1958 Proof set issued.
These coins are no longer in circulation, but unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they have little or no collector value. The Reserve Bank of New Zealand will pay face value for legally issued New Zealand currency. See the link below.
The New Zealand 5 cent coin was withdrawn and demonetised on the 1st of November, 2006. All New Zealand pre-2006 5 cent coins are no longer legal tender, but they are redeemable for face value at the Reserve Bank of New Zealand. Unless they are part of a Proof or uncirculated mint set or are individual Proof or uncirculated coins and in absolute mint condition, they are worth 5 cents.
Such a coin does not exist. The last New Zealand Halfcrown coin was minted in 1965.
Such a coin does not exist. The New Zealand 1 cent coin was first issued in 1967.
Such a coin does not exist. The New Zealand 10 cent coin was first issued in 1967.
The New Zealand 1 and 2 cent coins were progressively withdrawn from circulation from 1988 and demonetised in 1990. So, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they have little or no collector value. The Reserve Bank of New Zealand will pay face value for legally issued New Zealand currency. See the link below.
The first New Zealand 1 cent coin was issued in 1967.
All New Zealand pre-2006 10 cent coins are no longer legal tender, but they are redeemable for face value at the Reserve Bank of New Zealand. All New Zealand 10 cent coins from 2006 onwards are still in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 10 cents in New Zealand.
NOTE - All New Zealand pre-2006 50 cent coins are no longer legal tender, but they are redeemable for face value at the Reserve Bank of New Zealand. The newer coins are potentially still in circulation so, unless they are part of a Proof or Uncirculated mint set or are individual Proof or Uncirculated coins and in absolute mint condition, they are worth 50 cents.
New Zealand only issued a Twenty Dollar coin in 1995 and 1997.
Such a coin does not exist. There were no New Zealand 1960 Halfcrowns minted.