Currently, GearBest has this
Mecool KM8 P Android Mini TV Box - 1GB + 8GB US PLUG $29.40 + Free S/H to US (unregistered mail). It is based on an Amlogic S912 (octa-core CPU) and is supported by
LibreELEC. May be, you can run debian on it, too. I was hoping it would be a 2GB RAM. So far, this is the 2nd least expensive S912 Android TV Box I have noticed in the past two months. Anyway, if you need one, grab it before the offer expires.