I paid for $2020 delivered for whole set (TT22 Transponder +TN72 GPS Source + TA50 GPS antenna) and $130 for AV-74 Blade antenna, total of $2150.Joe
Take a look at the Trig TT22 transponder, TN72 GPS source, and TA70 GPS antenna, $2569 bundled at Aircraft Spruce.
All of the above has concerned ADS-B out. As for in, there are several options and it depends a bit on what other stuff (displays) you have. I have a Garmin 660 as my primary/only display and added a Garmin GDL 50 to get ADS-B In. I went with the remote version for the gyro but in hindsight wish I had gone with the “basic”: smaller, less expensive, and in an open gyro the built-in antennas are fine. I went with the “basic” for my fixed-wing and just love it: I even dropped my XM weather subscription because the ADS-B weather is so good. And for the fixed-wing, the AHARS makes for a great backup AI for IFR flying. They were $100 off of the $100 off price at the end of the year, so I got it for $600.Great thread, thanks for helping me get my head round what I may need, have to have, and want.
And pretty well all of us want... small, light, and pocket friendly