I bought them new, £700.
I dont think they are really, depends how many your going to do though, But a good set of discs and pads are better value.
Put it this way, new discs for HiSpec are £200 each for the front (If you want the two piece, 1 piece are around £180)
300mm 1 piece discs are going to be £176.41 (inc VAT)
300mm 2 piece discs are £185.84 (inc VAT)
Ktec prices, and these are cheaper than HiSpec directly aswell.
Pads arent bad though, £75 for carbon lorraine, but they have eaten my discs, so i now need new ones.