PS4 Camera | Gamestop | £39.97 (save £10)
Cards on the table: we're not convinced that the PS4 camera is worth buying right now. A bare minimum of games use it in any capacity, with only Twitch streaming and PlayRoom offering much in the way of value for money. Even voice commands only require a headset, so for most PS4 owners, we'd suggest that you save your money.
However, if you do want one, Gamestop have the cheapest price around. Thanks to King Squad @ HUKD!