I have an NGC-MAX, controller only for sale; it came with a GM-200 mount I bought off of Amart last year. The unit seems to work just fine, but I simply do not use setting circles very much. The encoder interface cable and power cord are for the Losmandy mount; you will have to purchase separate encoders and modify the power cord to remove the current mini-plug made for the Losmandy system.
JMI lists these for $429.00.
$325.00 shipped and insured in the lower 48.
Thanks for looking.