I've had my Dad's trombone for 20 years and am looking to sell it to someone that will play it. I don't really know anything technical about it except what I can see and remember. I would like it to go to a good home but don't know enough about it or how much to ask for it. Came across this and thought maybe I could get more info on it from knowledgeable people on the subject of trombones. Any help or advice is greatly appreciated.