I have an all brass regulation trumpet for mounted troops passed down to me from my Father. It belonged to my Great, Great Grandfather. He was in the Fourth Pennsylvania Calvary. The trumpet is said to have been hit by some type of artillery during the war. I also have a booklet titled "Fourth Pennsylvania Calvary", that was passed down along with the trumpet. It is in very good condition, and I am trying to find out what it may be worth. I may be interested in selling it. Does anyone know where I should start?