But it is. Infact, it's a lot cheaper than a lot of Sony's other products. A Sony Center will make more money from selling 1 television for £3,000 than one £400 Playstation3 and as they generally don't even have their Televisions set up correctly then it is more than likely that the Playstation3 won't be set-up correctly too.
You seem to forget, these none-gaming stores are selling products as a 1-off sale, they see no money back from selling future games, so £3000 is more tempting than £400. Remember when the Xbox360 was put into pods in gaming shops, even those weren't setup correctly in the vast majority of stores, so if a gaming store can't setup a games console properly what chance do a Sony store have. And by way of fact, I can speak of how poor the knowledge and setups of items in the Sony Centers are.