you're talking biiiiig dollars to purchase and install something in a certified aircraft though there's a few new ones popping up for Experimental's in the sub-$2000 range
Ironic? Certified aircraft are becoming relics, continually tarted up on the inside with 1930's, 40's etc technology, witness the continued stupidity of relying on vacuum pump run instruments, and the stupid cost of such.
Conversely, witness the extraordinary Dynon Skyview making its way into certified aircraft, bringing with it the ability to install ADSB
IN at a reasonable cost. You've gotta laugh at the 'certified guru's' turning their nose up at Dynon!
Now that SIDS will no longer be compulsory there'll be a bit of money left over for avioincs!