http://www.play.com/Music/CD/3-/2792/2-/Promo.html
Play are doing a Promo on the Fabric and FabricLive series of CD's at the moment - buy one get one free, but essentially they are going for £6.99 as i just bought 3 for 20 quid.
I can personally recommend the Plump Dj's one and the Global Communications one.
Thought you might be interested, seemed a great deal.