side glass cost?

Well i did somethign really stupid last year, i parked where i wasnt supposed to, and the parking people put those big orange stickers right on my CTS, if anyone has ever had them, they are a BITCH to get off...very very stubborn unless they are freshly put on. So while attempting to take it off, i scratched the hell outta my drivers side window ( i used to green side of the sponge not thinkin my hard scrubbin would permantly damage the window) ...anyone know aroudn how much side glass might run? I really want to replace it looks so bad, especially since my windows are tinted so you can really tell.