Kliz02, Unless this is a deluxe engraved, gold plated, mint condition early model H. N. White King, in which case it's value is purely as a collector's piece, it's value isn't high. Most horns of this early vintage, regardless of make/model aren't worth a whole heck of a lot as player's horns due to the antiquated keywork, sometimes sketchy intonation etc. Saxophones as a whole didn't begin to see major strides in manufacturing and design improvements until the 1920's for the most part. And this certainly applies to the King models as well. As a matter of fact, among many players even the later H.N. White Kings c. 1925 and later (after many improvements and redesigns were implemented) aren't in demand. I actually like the post 1925/pre Voll True model Kings, however I'm in the minority it seems. The value for a run of the mill Nineteen teens King Tenor in average condition isn't much more than a few hundred dollars at best, save for the special models mentioned above. My advice is to just keep it and play it. Cheers. Mike S.