XC Tracer Mini II GPS, in pristine condition – $225. Going to try out the XC Tracer Maxx, so will no longer need this one.
Has served me quite well and have never had any issues with it. If you’re not familiar, it is super sensitive and has (as far as I can tell) near instant response. Pairs very well (via BLE – bluetooth low energy) with Flyskyhy on the iPhone. Have heard good things about integration with other flight apps on other devices as well.