i actually took up the offer that was here the other day for The Orange Box on Amazon UK (£17.97) which was a cracking bargain, i chose the 1-2 days delivery service because that free delivery service blows chunks, everything i've ordered from that either got lost or took weeks to come. In the end i paid like £19.99 total.
So when i journeyed into Game in Wigan today i saw The Orange Box for the PC at the same price i paid for it on Amazon UK, which was £19.99. I presume with these kind of deals it'll be nationwide.
this is ideal for people who don't want to wait a few days for the Amazon order (mine came today, ordered it Monday) and wanna get it while shopping some time.