So my girlfriend was pulling out of the garage and nicked her passenger side mirror on the opening of the garage door. Its broken enough to the point where she would like a new one. I have done a little research and and found some for really cheap. (only 40 bucks) TO me this seems a little too cheap. Is that about right for a plastic side mirror for a 02 Saturn SL? Also she has manual side windows, would there be problems installing an automatic one instead of a manual? Part # is 21170588 if needed. Thanks guys