If your in the market for a 4Ti Tracer look no further. It was used only 7 times! So, it's in pristine condition. It was rarely used as a remote tracer in an optometric practice. Many 4T and 4Ti Tracers currently sold came out of Walmart and saw heavy usage, plus they only worked with their special software. This model comes with 2 serial com ports. It can be used as a remote tracer; used with most National Optronics edgers; or used with any OMA compatible software. It comes with everything but the owners manual and the original box. $1300