Wanted: Tennis Stringing Machine - Fixed Clamp Drop Weight

I'm looking to buy a used drop weight stringing machine with fixed clamps. I'll consider all offers but would rank my preferences as:
  1. Gamma X-Stringer X-6FC
  2. Gamma Precision II 602FC
  3. Alpha Pioneer DC Plus
  4. Any other drop weight with a fixed clamping system?
I'm in New England so we will probably have to ship. Let me know if you've got anything you'd like to offer!

Thanks - rdewing@gmail.com