That is too broad a question to be answered here.
Coin value would depend on many things including the denomination of coin, condition, year and place of minting and any peculiarities.
Most Australian decimal coins would have very little other than face value, since most of them are still in circulation. They would have to be Proof or Uncirculated to have any value.
Valuations for most Australian Coins can be seen on WikiAnswers using the format "What is the value of a 1961 Australian Penny" for example.
Any such valuations are taken from a current coin catalogue and are an agreed average paid for coins at auctions and sales over the past 1 to 2 years.
The first Australian Dollar coin was issued in 1984.
Such a coin does not exist. The Australian Two Dollar coin was first issued in 1988.
Such a coin does not exist. The Australian One Dollar coin was first issued in 1984.
The first Australian Two Dollar coin was issued in 1988.
a dollar
The first Australian Two Hundred Dollar coins were issued in 1980.
The conversion rate between the Australian dollar and the Indian rupee is one Australian dollar to 56.42 rupees. One rupee equals 0.02 Australian dollars.
The Royal Australian Mint never issued a Twenty Dollar coin until the 1990's and then usually in a mint set of bullion coins.
Australian one-dollar coin was created in 1984.
Australian two-dollar coin was created in 1988.
The last Australian One Dollar note was issued in 1982 and they were progressively withdrawn from circulation after the introduction of the One Dollar coin in 1984.
No. The Australian Two Dollar coin was first issued in 1988.