How much is my used saxophone worth?

How does the tenor saxophone work and how does its key systems work and how their used.?

• I have a question where i can't find and i would like to knwo how the tenor saxophone works and how its key systems are used and also how they work.

• Answer:

  The tenor saxophone is a long, stretched cone. The reed vibrates cuasing the air column inside the long cone of the combined mouthpiece, neck, and body to vibrate at a certain fundamental pitch, with all the keys down (a Bb for each of the saxophones, though it will sound an Ab on the piano for tenor and the other Bb saxophones, and Db on piano for the alto and other Eb saxophones). As each key is lifted, the length of the cone is shortened, creating a higher tone. The keys work from a basic lever system in that pressing on a key will either a) press down a pad to cover a tone hole simultaneously to lower the pitch, or b) lift a pad covering a tone hole to raise the pitch. For the keys to either come down or go up again, springs are installed and they cause the key and pad to move contrary to the action performed on them (if they are pressed down, the spring will cause the key and/or pad to rise again, and if the pad comes up, for the key to lower again). You do know if this is for homework, you can get in a lot of trouble for plagarising what I just said, and I'd bet that your teacher taught this or the textbook covers it. And let me correct something completely wrong. There are NO magnets on a saxophone, period. The keywork is attached to the saxophone via screws, not the springs.