First thought on seeing those prices is 'a fool and his money are soon parted', but there are presumably enough people out there who are money rich and time poor, who don't have the time to research and tinker to achieve similar results on their own, which probably makes this endeavour worthwhile for Patrol Base. When I started out in airsoft I baulked at the prices for some (toy) guns, and didn't mind gutting internals of lower end stuff and fettling to make them shoot as well or better than more expensive stuff. But now having made the grave error of growing up, and having too many children and other responsibilities eating away at my time, I don't mind forking out for something a bit pricier that doesn't require completely overhauling to be satisfied with. Not £1.4k though.