I have a new-in-box FiLiFi "Black" GPS tracker for sale. These are currently going for just over $140 plus shipping but you can have it in your hands -- and stop fretting about flyaways or dropping your Phantom into the middle of the forest -- for just $110 (U.S. & Canada). I'm selling this tracker because it turns out that I very rarely fly within range of a cellular signal. Yes, you can find cheaper but I doubt that you'll find a better quality or more accurate tracker. Developed and supported by Karl Beetson in England. Works in the U.S. on AT&T and T-Mobile. Details and reviews here: http://www.i-drone.me/index.php?option= ... uct_id=179 48 grams with built-in battery and safety strap.