How much is a 2005 buffalo nickel worth?

Assuming the reverse is identical to the lower left coin in the above image, it is likely to be worth not very much above face value unless it is in uncirculated condition or proof. Edit: however that coin is not the one usually called the Buffalo nickel. read more

The Buffalo nickel ceased production in 1938, being replaced by the Jefferson nickel. There was a 2006 one ounce gold bullion coin produced that is worth about $5000. No officially sanctioned 5 cent coins were produced by any US mint since 1938. read more

Since you put this under the category of “Nickel (element)” rather than coins or numismatics, I should say probably about 8 or 9 cents per coin, of which about 3 cents of which is the 75% copper that comprises the coin, just like any other ordinary nickel in circulation. read more