The knights templar state:Depends where the dents are but in the main dents should be no problem to playing.However the sax has to seal properly , and to be set up properly .With a lot of experience a player can work round certain leaks but it still makes it a nightmare for everyone. If you have any small dent on the the crook where it fits onto the sax to tighten it up, this is crucial, that can cause all sorts of things to happen and may not even be noticeable. It sounds to the knights templar that you would greatly benefit from getting your ou horn sometime.Good luck with that (Bird lives)

it depends on how big the dents are. a safe bet is that the dents aren't affecting your sound

Don't worry about how your horn looks. Worry about how it plays. Your ears will tell you if the sound is there or not. My first tenor, which was a Conn 16M, had a dent in the neck. It fell into my music stand :( My teacher borrowed a tenor, which was a 10M, for a show he had to do. He put my neck on the 10M and it sounded better than with the original neck. What i am trying to say is, if your horn sounds ok don't sweat it. Someday you will have a new horn, and you will laugh at this!!!! I really adnire your spirit and i hope that you stick with it. Best of luck to you :)