There were no Australian gold proof coins minted in 1984. Perhaps you refer to the One Dollar coin which is an aluminium bronze alloy and has a gold appearance. An Australian 1984 1 Dollar coin (Proof), uncirculated and in absolute mint condition could fetch up to $6 AUD, or maybe $10 AUD if it was in the presentation pack. A reputable coin dealer will be able to advise a more accurate quotation.
August 29, 2009 The 1988 Olympiad proof dollar has a value from $18 to $40 depending upon the actual condition of the coin. The $5 Olympic gold coin has a value from $225 to $300 depending upon the actual condition of the coin.
The Australian Two Dollar coin is made from copper, aluminium and nickel and is of a gold appearance. Very occasionally, some Proof coins are made from silver and issued in sets. The 2000 $2 coin was not one of these. If you have a silver $2 coin, it has been plated. Modified coins are worthless as a collectible.
~$10
There were 1,000 1988 Isle of Man Proof gold "One Angel" coins minted.
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A 1988 U.S. proof set has a retail value of $8.00 issue price was $11.00
None. There were 201 1992 Australian 1/4 ounce $25 Proof gold nuggets featuring the Nailtailed Wallaby minted. There were 210 1993 Australian 1/4 ounce $25 Proof gold nuggets featuring the Whiptail Wallaby minted.
An Australian 1990 1/10th oz (Proof) gold nugget (Grey kangaroo), uncirculated and in absolute mint condition and original packaging, could fetch up to $160 AUD. There were 2007 minted. A reputable coin dealer will be able to give a more accurate valuation.
"1988: Duncan Armstrong Wins the Gold at the Summer Olympics". Armstrong was the only Australian man to win a gold medal at the 1988 games; he won in 200 meter freestyle swimming.
I cannot find any reference to an Australian gold coin from any year with an eagle on it. Do you have any further information?
One dollar...
There is no record of the Royal Mint having produced a "gold" Proof set in 1974, only the usual Proof set. Royal Mint gold Proof sets issued from 1980 contain only the "Sovereign" coinage.