I have a pristine SCS PTC-IIpro (with display) with the Pactor Level 3 license for trade. This was a new old stock item that has never been used prior to me. I upgraded the firmware to the latest version 4.1r. I have had this modem operational, with AirMail and BPQ32, for a couple of months with absolutely no issues. There are two internal slots for additional DSP-II Packet modems which are still available from SCS. Power cable with Anderson plugs, original box and manual included. I am interested in trading for a operational motorized Tarheel Lift & Lay mounting system for a RV roof. If this is of interest, contact me to work things out.