This is a American Eagle Gold 1/2 ounce bullion coin. The value is tied to the spot price of gold at time of sale. As of 10-26-11 it's $1,720.80 per ounce, so the value is $860.40. 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. Collectors versions of this coin do have higher values.
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.
The value of a Silver Eagle coins is determined by the spot price of silver which right now is $29.23 which would be what your coin is worth, with perhaps another dollar added depending on condition for the coin itself.
The US did not make any silver coins dated 1978, if the coin is a large size Eisenhower dollar its likely only face value unless its Proof or Uncirculated.
If your 1972 coin is a uncirculated example it may be worth about $5.00 because the 1971 & 1972 issue coins were not included in the Uncirculated Mint sets sold from the Mint in those years. In general none of the coins made for circulation have any silver and are not worth more than face value. Only proof and uncirculated collectors coins sold from the Mint have premiums. The Mint did offer Proof and Uncirculated coins in 1971-1976 that were struck in 40% silver.
Regardless of which mint mark it has, values are 5 to 10 cents. Uncirculated coins are a dollar or less.
If it is a U.S. half dollar the bird on the reverse is the same as that on all other U.S. quarters, halves and dollars - the American Eagle. Unless your coin is uncirculated it is only worth face value.
Average retail values for circulated coins are $650.00-$770.00 Uncirculated start at $960.00
This is a Eisenhower dollar. None of them regardless of date or mintmark, struck for general circulation have any silver and most are not more than face value. For coins dated 1971 & 1972 uncirculated examples may have a little more value due to the fact dollar coins were not included in Uncirculated Mint sets sold in 1971 & 1972. In general, only proof and uncirculated collectors coins sold from the Mint have premiums.
Depending on the grade, the circulated 1906 Quarter Eagle's current retail value is between $180.00 and $390.00. Uncirculated coins start at $414.00
The 2008 Bald Eagle $5 dollar gold coin was issued as Proof & Uncirculated, both were struck at the West Point Mint but just the proof coin has the "W" mintmark. Current market value is the same for the coins at $410.00.
There is no such thing as a Presidential quarter. These are dollar coins. They are not gold. They are brass. They are worth around $2.00 in uncirculated condition. These coins are very common.
Based on the current price of the ounce of gold they contain, they are worth about $1150 each.Dan MooreThe Working Man's Rare Coinshttp://www.workingmancoins.com
Retail values are $7.00-$8.25 for circulated coins. Uncirculated coins are $8.50
Value for circulated coins run from $600.00-$730.00 depending on grade an $830.00+ for uncirculated coins.
In uncirculated condition, it should have a value of $15-$40. Higher quality coins command a higher value.
The coin is a Eisenhower dollar and has no silver in it. Only proof and uncirculated coins from the mint have more than face value.
3 to10 cents at the most for average coins, uncirculated coins are 50 cents to a dollar
Assuming you mean a 1991 Silver Eagle, proof and uncirculated coins were struck that year. Proof coins were struck at the San Francisco Mint and carry the "S" mintmark, mintage was 511,925 and have a current retail value of $18.00 Uncirculated coins were struck at the Philadelphia Mint, carry no mintmark and mintage was 7,191,066 with current retail value of $17.00