If anyone has a 5mm Varian or Nalorac QUAD (1H/19F/13C/31P) probe for a 500 MHz Unity or Unity Inova console that they would consider selling, I'd appreciate hearing from you. This is the major probe for 2 of my 500 systems and I need to invest in a spare. Vera Mainz NMR Lab, School of Chemical Sciences Univ. of Illinois at Urbana-Champaign office phone 217-244-0564