I have ADS-B in via a Gamin GDL 39 and Area 796. All I needed was ADS-B out to be legal. Appareo makes an all in one box (the Stratus ESG ADS-B Out and WAAS GPS) for only $2,995. Size-wise this is a replacement for most King and Narco transponders. I had a Narco AT-165 that was about 10...
