Like I said I got a "full 4 wheel alignment on a hunter machine" for £50 cash with a place called Orchard Motors in south wales..
They are no tyre monkeys like the lot you find in discount tyres, ATS etc.. Infact they are specialists with german cars and have years of motorsport experience so they know there stuff and did a fantastic job of setting my last car up after lowering and other suspension changes.
I think a lot of it is down to area, E.g in london I'd expect to pay more..
But.. I would never pay £200 to a dealer unless I had no other options within a reasonable distance to myself!