$790 14 chs https://www.emotiv.com/epoc/

$249 4 chs choosemuse

choosemuse tech spec

$190 neurosky

neurosky developer tools

CUBand

SimpleLink SensorTag jpg

SimpleLink SensorTag pdf

BrainSensor

e-Health Sensor Platform V2.0 for Arduino and Raspberry Pi This package allows us accessing -near-professional sensors.