how much for just the helmet cam?

125 is my absolute low ill go on it, its a bullet cam, so you need a little camcorder to hook this into, its just a lens and battery pack that hooks into the video out of a camcorder, lots of people think its just its own little camera and just works how it is, but it needs to hook into another camcorder for it to have something to record to, just giving the heads up, you might know this already, but lots of people have messaged me not knowing haha