Re: repad questions
Welcome to the forum.
Do you not play the saxophone?
King is generally a very good brand for Saxophone. If it were mine, and it needed an entire repad, I'd pay a professional to do. The pads do not self-adnere, but there are a couple of different options. Plus, you can't just stick the pad in there and call it good. It has to be at precisely the right angle to seal against the tonehole. Sometimes key adjustments are needed.
Though the King is generally a very good horn, the market does not always reward that. If you find the right buyer, you might obtain a decent amount. But I believe the horn is worth more than what you are likely to get for it.
As for what a repad job costs, I don't know.