I was wondering what the best and cheapest way to mimic the movment of a head! if i was to use a normal servo! it could only go up or down! what could i use so that it could go up down left and right?
You need to use two servos; this arrangement is commonly called a “pan/tilt rig”. LynxMotion sells a bracket kit that should make this pretty easy; see
http://www.lynxmotion.com/Category.aspx?CategoryID=61.