The answer depends on the country whose coinage the question is about.
There are no British general circulation decimal coins that could be considered to have any collector value unless they are "Mint Uncirculated", "Proof", or part of a "Mint" or "Proof" coin set.
Which country are you referring to? A UK 1970 proof set (last of the pre-decimal issues) can be bought for around £15-20.
The 5 coin proof set has a value of $6, the 10 coin set has a value of $15 and the 10 coin silver set has a value of $48.
A Mint issued uncirculated coin set has a current value of $8.00.
what is the value of a Jackie Robinson legacy coin set with baseball cqard and gold coin
Value would be between £4- £6 as at October 2010.
Which country and what type of coin set?
The actual value would be based on the worth of each coin in the set.
There was no 1960 British 5 coin set issued.
A Mint issued 1984 Uncirculated coin set has a average value of $5.00. Issue price was $7.00
All years of issue of the British decimal Twopence coins are still potentially 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 2 Pence.
The 10 coin set has a retail value of $30.00-$35.00