Got a whisper from a friend about his cheap single-board computer.

Have now two of these running with RTL-SDR receivers, decoding ads-b.
Works very good, much cheaper than original pi’s

armbian linux

$10 Orange pi zero.

opdate 08.07.2017

There have been some reports of some instability regarding the wifi on these devices, but I have been running mine 42 days without any incident.