As an owner of this pretty much cheap and quite alright device I had hard time finding proper root method but in the end it was found..
Mine was already on 4.2.1 and the rest is as usual 1,5ghz dual core, mali 400 graphics, and apparently cortex a7 not a9 as on the box.. but who cares, right!?
so i got to the file (its actually based on crystal_root method from xda but some smart guy somewhere just made it work for 4.2 generic tablet ) I apologize if this si mentioned somewhere else, and I couldn't reply to crystal root board cause i am a noob, but I am sure some people will find this useful, that's all.
ok...you can chat here with me untill i got those 10 posts to upload link, you can google "Aigo M80E - JB 4.2.1 - help with rooting (killing cell standby)" or you can be a good soul and my first mate here and paste link