Saw this deal online and was at first a bit miffed to have missed out on it. But thought it was worth a shot seeing if any of the local stores still had any. Walked into Currys Digital, there it was sat on the shelf, priced at 19.99. Asked them to check the price on the till and it came up at 4.97. Managed to get a copy of the Vancouver 2010 olympics yesterday in there too. They said that their pricing system wasn't working properly and the tickets weren't allowing for any offers. Or something like that anyway.
Worth a look in your local anyway.