What denomination?
A date is needed, post new question.
Value All depends on grade mint mark and condition of the coin. Consult a professional coin dealer.
About $65.00 as of today 2-22-11
8-12-11>>> This is a American Eagle Gold Bullion coin. a Twenty-Five dollar denomination coin is One Half-Ounce (1/2) of pure gold. The value is tied to the spot price of gold at time of sale. Right now it's $1,767.60 per ounce. Current value of this coin is $883.80. This price is a little less than you could buy it for and a little more than you could sell it for. But it gives you an idea of value. A 1986 $25 coin certified as MS-69 by a recognized grading service has a average retail value of $1,000.00. This is not a significant increase in value. Because of modern minting technology, high grade bullion coins are more common than most people think. NOTE: The spot price of gold and other precious metals changes by the minute when the market is open. So the value of this coin will go up and down.
You have a normal half dollar coin that was plated with a small amount of gold by a private company and sold as a collectible. While it is quite attractive (even unaltered, the Walking Liberty design is considered by many to be one of the 2 or 3 most beautiful U.S. coins) it has no special value to coin experts. In fact, it's considered to be an altered coin worth only its silver value of about $7.
If you are asking about a "1986 Statue of Liberty 6 coin commemorative set" in a cherrywood box. The set consist of one each of Proof & Uncirculated half dollar, silver dollar, and gold $5 coins. Current average retail value is $900.00.
8-15-11>>> This is a 1986 American Eagle Gold Bullion coin. The Twenty Five ($25) dollar denomination coin is One Half-Ounce (1/2) of pure gold. The value is tied to the spot price of gold at time of sale. Right now it's $1,744.50 per ounce. Current value of this coin is $872.25. This price is a little less than you could buy it for and a little more than you could sell it for. But it gives you an idea of value. NOTE: The spot price of gold and other precious metals changes by the minute when the market is open. So the value of this coin will go up and down.
$2.50 gold coins were issued for about 150 years at a half-dozen mints so much more detail is needed. Please post a new question with the coin's date and whether there is a small mint mark letter on the reverse side.
This piece needs to be seen for an accurate assessment. It is NOT a U.S. Mint issue. The lowest denomination gold coin issued by the Mint is One Dollar. They are California Small-Denomination and or Fractional gold. Some are round, others octagonal with Indian heads or Liberty heads. Most of these pieces are gold plated. Coins with bears on them regardless of date, are modern replicas that have no collectible value. Some pieces do have value, so take it to a coin dealer. But don't be disappointed if it's worthless.
As of 2-14-10 silver is $15.51 per ounce so that's the value of the coin.
Please check the coin again and post a new question. The US has never made a $2 coin of any type.
August 2, 2009 The 1886 Gold Eagle in excellent condition has a value from $350 to $600 depending upon the actual condition of the coin.