Ironically before they put the prices up by over 50% they were selling in relativley high volume, as gw have put the prices up by a certain % the revenue has decreased by the same %, showing games workshops complete lack of understanding of elasticity.
Your suggesting prices went up 50% in one go, i cant remember when they did.
The reason why revenue went down was the lord of the rings bubble burst and they had nothing to replace it with, so this downturn in revenue you are looking at is simply return to normal trading figures.
Thats why we got apolcypse, a good reason to sell more minatures, and the following year a new edition of 40K and a new marine codex the following that. Ever wondered why they were released out of cycle.
They are delaying on the thunderhawk gunship for when planet strike is released.
the trading downturn is not due in the main to increased prices but just the LORT bubble bursting
In fact, in real terms GW is offering better value for money.
The very first box set i purchased was a 10 man box of Angels Marines, the one with the Lascannon, and plasma gun. that cost me £15 for 10 metal minatures
look at the tactical box set now. only £18 and you get so much more.
Terminators on the other hand have gone up from £25 a box to £35 a box.
reason being, high investment costs and most people will only buy 1 or 2 for their army.
I wont even start on the value for money you get in the new starter set.