Up and Away,
How far north are you talking?
If someone is working for nowt then he's doing nobody any favours least of all himself and if your asking how much for an examiner, then that's probably why your not 'raking it in', as for how much you should be charging I have no idea as I never reached the lofty heights of examiner, but I will try and find out from some of my richer friends who did...how's that?