I've just spent ~£350 on some VBT grooved front discs and EBC redstuff front pads, parts only. They're not difficult to fit - so I'll be doing it myself. However, if a garage wanted to charge me over £500 for the same parts fitted, I'd be surprised. £800 for pads and discs all round seems steep to me, unless they are uprated parts, then it might be ok.