Agreed chris you could build yourself a pretty good ca18 engine for that kind of money and know its right.$10k for a mild ca18 build is a bit extreme.
It doesnt look like a turbo or manifold is supplied either stock injectors and cams no adjustable pullies. I think they guy is dreaming.
If it where dyno proven to make 450hp which I doubt it would it might be worth the money with all bolt ons.