Any value would depend on whether they are Mint Uncirculated, Proof, Year Sets, or circulation coins and what condition they might be in.
The current value of a 1950 proof set is $750.
The NZ dollar is currently about 80c US. And there are 100 cents to the NZ dollar. But coinage is only usable generally in the country of issue. Banks will handle notes, but not generally coins.
The set needs to be seen for an accurate value. A complete set of Lincoln cents from 1938 to 1959 has 62 coins in it.
The value of NZ coins varies widely, and you will find a book listing these at most coin and stamp dealers.
9 coins: $4708 coins: $170
The FACE value is the same as all other US coins set by the denomination.
ALL us minted coins by stated value for a given year
The 1994-S Clad Proof set (5 coins) with all original packaging has a current retail value of $8.00. Issue price was $12.50.
Face value only.
The 1999 Uncirculated Mint set has 18 coins in it but no silver coins. Retail value $14.00 The 1999s Silver Proof set has 9 coins in it. The half, quarters and dime are 90% silver. retail value $288.00
If you have obtained an annual uncirculated 1975 yearly set, its present value is: $15.00.
Incomplete question - no country mentioned nor what coins are in the set.