dealer or pattern ??
iirc nissan ones are 58 plus vat, pattern disc's are around £36 (inc vat)andaftermarket grooved disks (EBC) are about £98 inc
dont forget a set of pads what are £18-48 depending what you want, the nissan ones have a rock hard compound that eat disc's
eurocarparts arnt too bad on price if you want nissan parts try the link up the top in the discounts forum