Hi
I have this old kodi box from 2013 running kodi v13.2 (gotham)
the "manufacturer" says that it can't run anything later than that
some people recommended libreElec so here I am 
I am not very experienced with flashing but I read that I can boot from an SD card which should be easier to setup
my device is AMLOGIC MESON 3 8726M (cpu=ARM v7, 4GB, 1GB ram)
I found images in this forum for 8726MX (MX2)
will they work for mine or am I going to brick my unit?
thanks
You have 8726-M3 which is not compatible with 8726MX builds. As far as I know there is no community build for your CPU, at least not on this forum. 
You have 8726-M3 which is not compatible with 8726MX builds. As far as I know there is no community build for your CPU, at least not on this forum.
bad news, but thanks!
do I have any other options, perhaps some other kodi distribution like libreElec that will work on my box? Or do I have to buy a new one?
Or do I have to buy a new one?
Yes
Was this originally Android? There is a FTMC image from android 4.4
