My local CEX is on the same street as Gamestation (so same thing as Game these days). They actively collude to not compete with each other on price right in front of customers - I've been in gamestation when someone from CEX strolled in and they swapped information about how much each shop was offering on trade in for a certain game (can't remember which one, it was ages ago).
CEX trade in: £84.00
AS CeX is within the mile GAME were forced to trade in price match
Walked out with FC3 and £41 quid on a gift card and £9 on the rewards card.... That may go towards a Wii U
Given the trade in prices are handed down from head office I assume they then feed that information back (assuming this happens in various places due to regional differences in demand?). Might explain why on some titles theres a huge difference in some titles and not others - on the big titles they can both rip off customers equally without losing customers to each other.
3DS: 4055-2781-2855 Xbox: darkmorgado PSN: dark_morgan