As Cutler said, it's a Buffalo Nickel. There are some 'key dates' of this series that could fetch you a little money. The thing to do is look closely at the Indian Head's shoulder for the date. In addition, beneath the Buffalo on the reverse, you will find the Mint Mark (if any).
If there is no date, then it's worth face value. Some people in the world do pay $0.07 - $0.10 for dateless Buffalos...