Mk1 octy vrs rear oe calipers and discs

I had a sticking caliper so ordered new ones only to find out it was the hand brake cable and there's nothing wrong with the but fitted new ones wen I fitted coilys. Calipers are in good working order and discs which have covered 6k there's a slight lip on the discs but have plenty life left in them there's pads to but not much life left in them but no uneven wear £90