Well, it depends on what year it is as well as the serial number....I'm gonna guess it's an '03....Unless it has a nice serial, it probably is'nt worth much.....
I keep all star notes and silver certificates no matter what condition they come to me in. It only costs a dollar to hold it and it could gather some premiums some day. Especially the '57. I'd save it if I were you but thats just me.