This coin is commonly called either a buffalo nickel or an Indian head nickel (*). Please see the question "What is the value of a 1927 US nickel?" for more information.
(*) But not a "buffalo head nickel" - after all, it shows the whole buffalo!
Assuming the coin is circulated and has no mintmark, the 1927 Buffalo nickel is very common, average coins are $1.00-$5.00