I posted this on another site, so forgive me if you've already seen it. A friend has this King Master Model cornet he's wanting to sell, but has no idea of the value. I took it home with me and cleaned it and oiled it to try it out. It seems to be a nice old horn, but is a little too bright for my cornet tastes. The s/n dates it to 1941, and U.S. is engraved on the bell and stenciled on the case. The only things wrong with it are a little valve wear, a few places where the bell was straightened, and a brass, non-King 3rd valve water key. I don't want it, but what should I tell him he should ask for it?