Want to buy used CZ3D

The serial #'s refer to the manufacturing company as Fisher was sold to First Texas and with the CZ 3D the serial #'s will determine whether it's made from the original Fisher company or First Texas. I believe it's a technical question as they are very difficult to setup to original design factory specs and there is a quality control issue and most prefer the old Fisher Company machines produced in Los Banos , thus the serial # question.