Hello, I'm looking to find out how much i should sell my Brass instrument for and was wondering if anybody could help me gain an idea of a fair price as i don't want to overcharge. I own a silver Beson type A protoype compensator Euphonium, i've had it for around 10 years and paid £450 for it used, which at the time was below the odds as it was aquired through a family friend who was well copnnected. It has 4 valves and is in pretty much the same condition as when i bought it minus one or two small dents. Any advice would be very much appreciated. thanks!!!