I was looking at some of the models in one of the cases just before we got kicked out of GW Manchester at the end of gaming night, and had a quick chat with the staff. I now know the secret of how GW employees make such huge armies and afford conversions where they use one part of a £4 model - huge staff discount.
One of my friends used to work in GW Manchester, and he's told me about the "buy the metal bits, get the plastic bits free" offer that they got that allowed him to make a big pack of Dire Wolves for Warhammer on the cheap. Apparently they also get 50% discount if they buy in the shop!
But that's not the really cheap part. The really cheap part is that if they buy from Mail Order then they pay by weight! So a single metal trooper is tens of pence instead of nearly £1.50 with the current prices That's just unfair :\ everything is hugely over priced compared to that!