Standard rate is £39.99 for a head unit. But a VAST majority of the time we normally charge £19.99 as most strereos have a offer on or it's worth going for one becuase of the cheaper fitting charge. To be fair, I awalys thought £40.00 was extorsionate until someone pointed out what THREE of our local independent retailers charge. They started from £45.In which case our more common £20 charge sounds more than fair to me.