In 1909 Indian pennies were ending their years of production and making way for the new Lincoln cent. The number minted is far less than most years creating a fundamentally scarce coin.
Next, identify if your coin is the rare "S" mint 1909 penny. San Francisco minted a relatively small number of Indian pennies and their value starts in the hundreds of dollars.
Finally, the condition of your coin is very important. Condition has always played a major role in all coin values. However its influence increases with the large jumps in your 1909 Indian head penny value from one grade to the next. If you can easily read "Liberty" across her headband it indicates your coin is in better condition than most and higher value.