This one is in original condition, no modifications that I could detect. Electrically it appears to be working as it should. I went through the performance checks in the manual and got the meter readings that the manual specified. Because of its age I am selling the unit as is with no returns. Physical condition is good with minor scratches and paint chips. Unit includes a line cord and I will put a copy of the manual on a CD. I would prefer that this is purchased by somebody that is already familiar with these units and knows how to set them up properly. I want $1500 for the unit plus shipping. I will accept PayPal or personal check. If payment is by personal check shipment will be delayed until the check clears. I will pack the unit carefully, double boxed. Shipping to US and Canada only. I can supply additional photos if interested.