I went to one shop here in Pomona and the guy said I need to replace my rotor because its already too thin, it has 8.36 (left side) on their ruler thing reader, I didnt see the other wheel, so I purchased a new rotor (not sure what brand) and a new set of ceramic pads, they also adjusted and clean the rear brakes. All for $320. Have I been had? Or is this a good deal? Does my old rotor unrepairable? Thanks.