You are buying a used 3D Robotics APM 2.6 and Power Module that have both been very well cared for.
I am switching to Pixhawk for my T810 rig so this is gotta go. GPS/Mag and Radio not included.
What's in the box?
APM 2.6
3DR Power Module with XT60 connector
PPM and JPI jumper connectors...