ask26: "Sagetech Transponders with ADSB In"
I guess, you meant to say "ADS-B Out"...
"In" is only for the receiving part of the equation...
The Sagetech website offers In solutions for 1400 bucks, if I am correct. Something tell me that Out will be "a bit" more costly.
And Out solution isn't available yet:
Quote from their website: "Between now and then, let’s get acquainted. Click the button below to be notified by email when the Mode S ADS-B Out Transponder will be available."
But if they do that - that would be a nice thing - it seems like the size is really small, comparing to what I am working with...