Please post a new question with more information. What date? What mint mark, if any? What does the design look like?
All of those details are needed to help ID your coin.
Please see the link below.
If it's silver, then at least $30.00
The Australian Koala series of coins were only ever minted in platinum and the Twenty-Five Dollar coin was only ever issued as part of a set.
value of 1845 us five dollar coin
There was no 1970 British Crown (Five Shilling) coin minted. The last British predecimal Crown (Five Shilling) coin to be minted was in 1965.
An Australian 2008 Five Dollar coin (Bradman's 100th Birthday), uncirculated and in absolute mint condition could fetch up to $25 AUD. There were 4,700 minted. A reputable coin dealer will be able to give a more accurate valuation.
The only gold Bicentennial of Congress coin minted is a Five dollar coin not a half dollar, it is valued at about $300.00.
This is a very common date Half Eagle coin. Circulated examples run from $450.00-$550.00.
August 11, 2009 Generally, drilling a hole in a coin lowers its value considerably. If your coin was minted in Philadelphia or San Francisco, then it is probably not worth too much more than gold value which is $114.32 today. If it was minted in Carson City then it probably has a little more value since these were minted in lower quantities.
An Australian 2008 sterling silver Five Dollar coin (Scouts Australia Centenary)(Proof), uncirculated and in absolute mint condition could fetch up to $95 AUD. There were 5,000 minted. A reputable coin dealer will be able to give a more accurate valuation.
There was no British 1886 Crown (Five Shillings) coin minted.
Such a coin does not exist. The New Zealand Five Dollar coin is Non-Circulating Legal Tender and was first issued in 1990.
Please look at the coin again, the US did not coin $25 dollar denominations in 1896.