MaxBotix MB1240 XL-MaxSonar High Performance Ultrasonic Range Finder.Brand new - still in original packaging.This is the recommended sonar for the APM ArduCopter, for accurate distance readings.Asking $27 + shipping - compared with $39.95.
Genuine 3DR APM 2.6uBlox GPS with Compass KitPower ModuleBought Fall 2013. Flown fewer than two hours total.All in excellent working condition.$160 + Shipping (Ideally within North America)
"Hello. My copter suffered a battery failsafe and automatically switched to LAND mode - I'm running 3.1-rc5. According to the Wiki, the copter should disarm motors after it lands, if the throttle is at zero. I pulled the throttle low, once I figured…"