This is a bullion coin sold by the US Mint. Its price fluctuates with the price of gold. It contains 1 oz of 0.9999 fine gold, and as of 02/2010 it retails for about $1300.
However, beware of scams involving plated replicas being sold as "gold". See the Discussion section for comments.
Unless it's a proof coin, just face value.
A 2006-W American Eagle bullion gold coin is worth in an uncirculated state: $90.00; should this coin be in a proof state, its value is: $125.
The 2006s 10 coin proof set has a retail value of $31.00 issue price was $16.95
Both versions (Proof & Uncirculated) of this coin have the same average retail value of $115.00
Current retail value for a MS-70 2006 $50.00 Buffalo bullion coin is $1,540.00, the identifier " First Strike" adds nothing to the value.
Unless it's a proof coin or uncirculated, it's worth the same as the hundreds of millions of other state quarters in circulation; i.e. face value only.
5 cents. Gold plating adds a very thin layer of gold on the coin, it hardly increases the coin's value. The 2005 buffalo nickels were intended for circulation and only worth 5 cents unless uncirculated or proof, but since your coin has been damaged due to gold plating, even if it was uncirculated or proof it is now just worth 5 cents.
Even with a Proof coin grade drives value. So from $3,000.00 to $20,000.00.
The 5 coin proof set has a value of $6, the 10 coin set has a value of $15 and the 10 coin silver set has a value of $48.
8-1-11>>> The 2001 Buffalo silver dollar was issued as Proof and Uncirculated, both types have the same value of $115.00.
Average retail value for the Proof coin is about $40.00.
Assuming the coin is circulated and has no mintmarks, retail value is $1.00-$4.00 for most coins. The 1930 Buffalo nickel is a very common coin.