What is the value of a quarter with a statue on the front and an eagle on the back?

Not enough information. It's possible you have a Standing Liberty quarter, in which case it's not a statue on the front, it's a picture of Miss Liberty.

If the coin's date is visible please post a new question with that information. If it's worn off (a common problem with SL quarters) it's at least worth about $2.50 for its silver content.