1-year old PortaPilot Clamp-on Accessory 2-axis Autopilot. I used it a handful of times and it works as prescribed. My 172 is finally getting dual G5s and a GFC500 so I won't need the PortaPilot any longer. I've recently received the components back from PortaPilot and they were serviced/checked/tested and re-sent back to me. Several accessories included, shown in pictures. Extra cables, parts, DC power wires, USB, etc. As the invoice shows, despite I having bought it on a deal last year, I paid about $2800+ for the kit. Trying to recoup as much of the purchase as able. 

On the subject of the PortaPilot, the product works as intended but their service is truly remarkable. Yarden Sheffer, the owner, personally answers calls/emails. The one small issue I had, a magnet dislodged from the clamp, they rush-shipped me a replacement complete free of charge. As of late, also free of charge, they did the software update and tested the unit. They truly back their products and support the end-user... hard to say that about even Garmin sometimes. 

Ask Any Questions. I'll ensure it's packed great for shipping.

Per PortaPilot's Site - STRESS-FREE FLIGHTS

Wing Leveling, Heading Hold, Flight Plan Tracking, Altitude Hold, and Course Reversal, all without any aircraft modification.Clamp-on Two-Axes autopilot control that fits in your flight bag. No professional installation required. Compatible with Cessna 172L and newer.

PortaPilot VNAV edition features Two-Axes autopilot control for your light aircraft. This Portable, carry-on device quickly attaches and detaches in flight with a single motion, works standalone or with external GPS, and can provide waypoint navigation, heading hold, altitude hold, and much more.

Best of all, installation can be completed in a matter of minutes by the pilot, with no modifications to the airplane, or added installation cost!

Compatible with most Cessna Skyhawk 172L and newer , and GPS devices with wired serial output. Aircraft with 24V systems require our optional 28V to 14V Voltage Reducing Power Cable. Be sure to see our compatibility page for more details.

Features:

Wing Leveler

Heading Hold*

Flight Plan Tracking*

Altitude Hold

Course Reversal

Compatible with GPS navigators

* Requires GPS