Dulcimer - Wanted Professional or Concert Mountain or Appalachian Dulcimer

I am interested in upgrading to a more professional or concert dulcimer. I would like a used custom or special McSpadden, Blue Lion, Bonnie Carol, John Stockard, Kurt Simerman, Dwayne Wilder of Bear Meadow, Gary Gallier, Bob Gernandt, Van Dusen, or similar quality.