I purchased this Foreflight Sentry Plus ADSB about 6 months ago for $799.00. I used it a couple of times while leasing various aircraft. I am no longer flying, so I don't need this. I chose it for it's battery life (18 hour) and for the CO2 monitor. Here's the Foreflight Description: Sentry Plus builds on essential safety-enhancing capabilities with powerful new innovations to put a + on your flying and debriefing workflows with subscription-free ADS-B weather and traffic, carbon-monoxide monitoring, a high-performance track log recorder, AHRS for backup attitude + g-Load tracking, and more in a compact case with industry-leading battery life. I will take $700, including shipping to the lower 48.