Hello!I`m just wondering what a Bach Stradivarius trombone 42G w/ F thayer rotor mechanism almost new condition (couple of scratches which can be buffered out), including a Doug Elliot Lt 101 mouthpiece and leather grips on the trombone would go for used. I`m trying to sell one and need a price of how much they would go for used, anything will be helpful! Thank you very much. Oh yeah the Bach Trombone case included also