I love getting new clarinets! I seem to only have unusual ones, and I like to know everything I can about them. The K Series is pretty hard to find much about. I have searched everything I can think of and have little idea of its real value or other tidbits. It is has a K3000 serial number. It is an enhanced Boehm. The barrel has been replaced with a Backun barrel. I just got it today and it seems to play great and will take it to symphony practice tomorrow to really try out. (I am an adult member of the local youth symphony.) I am having trouble with the very high notes, but I think it's just that we are still getting used to each other. I am playing with a Selmer HS mouthpiece. Any bits of wisdom since any relevant old posts were made?