Maybe it was £480 plus delivery then? Been a long time since I ordered them! Haha.
The rear on mine is as low as it will go and the adjusters have been taken out too. The rear wheel is just very slightly up in the arch, maybe 5mm or so?
The front you could drop stupidly low if you wanted, there is as much adjustment as you could want. So unless you're wanting the wheels tucked right into the arches then the kit should be fine?