I have messaged this guy a few times regarding a pair of nc30 discs cheap and he seems genuine and always quick to reply to my questions, i decided to get new in the end and I thought that some else here would be interested. http://www.ebay.co.uk/itm/261209945397? ... 1423.l2649

They've got a nice lip on the outside of the braking area, that's always put me off when looking at used discs.