I have a Buescher 400 alto sax, serial number 103XXX, which I believe may have been built in 1923. From what I understand, quite a few of these horns were built, but is there much of a market for them? This one is in very good shape; rarely used the past 35 years. It has its original lacquer, top hat engraving, castle with trees, sterling silver "Buescher 400" name plate on the bell, very minor blemishes. Just wondering if anyone is familar with this instrument?