[Guardsred911]

I would think that the rust on the bezel's is a strong indication of a leaking seal somewhere in the glass/seals that let in moisture..... perhaps also supported by the current owners comments that the winsheild whistles.... I have seen similiar issues on older BMW's where the owner left it outside for a long time and water made it's way into the sunroof seals (almost identicle to the Porsche seals of the same era)...

It might not be too much to get the seller to agree to let you pop the passenger side panel and see why the window isn't working. Could just be an old motor, or it could have leaked something fierce and ruined the motor, and caused rust on the inside of the door, as well as perhaps the moisture issues. Not a deal breaker, but good to know. (assuming you know how to do this...)