I'm well aware that Gamestation is owned by Game, believe it or not, I had a summer job working for Game some 10 years ago, back when they took over Electronics Boutique to secure more of the market. They also had lots of underhand policies, such as allowing employees to take home brand new games, play them for three days, then put them back on the shelf as brand new.
Game is still the flagship brand on the high-street and considering how hard they push pre-owned sales, it's odd then that they do not do pre-owned PC games, yet Gamestation do.
I'd imagine that Cex probably do like you say, but then as I said earlier, in regards to second hand DVD sales, they had a different business model, and are not what the Publishers are targeting.
It doesn't matter what technology they use on their servers or what somebody says or thinks on their internet forums. To think that they would make it so that Wii/Xbox/PS3 owners can only play single player games with an internet connection is ludicrous and your living in cloud cuckoo land.
Am I?
http://www.joystiq.com/2010/04/21/ps3-final-fight-double-impact-requires-psn-connection/
I don't think I need to say anymore, this is the direction ALL games are heading in I'm afraid (and the carrot is Achievements).