Some years had more than one Proof set issued.
If the coins are Proof sets produced by the Royal Australian Mint, an average for each year set might work out to about $60 each.
A reputable coin dealer will be able to assess your collection and give a valuation on examination.
It should be noted that any Mint Uncirculated or Proof coin set should be in the original packaging and condition.
The last Australian Halfpenny was minted in 1964.
That is too much information to be listed here. It would depend on whether you refer to Mint Uncirculated sets, Proof sets, or precious metal sets and which variant of any of those sets including the means of presentation and or packaging.
Decimal currency was not introduced into Australia until 1966. There is no such thing as an Australian pre 1966 cent.
Australian Proof coins were not sold as sets until the introduction of decimal currency in 1966. They were sold as individual coins. A full set of Australian 1958 Proof coins, in absolute mint condition and the original packaging, could fetch up to $2,315 AUD. A reputable coin dealer will be able to give a more accurate valuation.
Such a coin does not exist. The first and only round Australian 50 cent coin issued for circulation was issued in 1966. There was a round commemorative Proof coin issued in 2006, but not for circulation.
There is no Australian "cent" from 1938. Decimal currency was introduced in Australia in 1966.
There is no Australian "cent" from 1939. Decimal currency was introduced in Australia in 1966.
Such a coin does not exist. The Australian "cent" coins were first introduced in 1966.
The Australian 2 cent coin was introduced at the changeover to decimal currency in 1966. There were no Australian "cent" coins minted prior to 1966.
There were no Australian 10 Shilling notes printed in 1966. 1966 is the year they were withdrawn after being replaced by the One Dollar note.
With both the 1966 Australian "Proof" and "Mint" sets, sets labelled "Commonwealth of Australia" include 5, 10 and 20 cent coins minted at the Royal Mint London. With sets labelled "Royal Australian Mint", all coins were minted at the Royal Australian Mint Canberra.
These 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 20 cents.