@Sunamer
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:
From their site;
Versions Available
Mode C Transponder – Small, high reliability solution for Mode A and Mode C requirements (Mark XA AIMS certified version is also available)
Mode S Transponder with ADS-B Out – Enhance your safety of flight, thanks to increased visibility afforded by NextGen's ADS-B
Mode S Transponder with ADS-B Out and GPS – Include your GPS location in Mode S communications
Have a look;
Sagetech | Unmanned Transponder Solutions