The sax is probably going to need a good check-up, at least a few pads, and some adjustments. I'd recommend taking it into a reputable technition and having them check it out. It's certainly worth putting some money into. Like Dave said, the top octave vent tube may need a tweek, or their could be spring off, or broken. These are pretty easy to fix. I would probably just clean it up, do a complete repad and recork, replace any broken springs and get everything adjusted properly, and you should be set.