2016 chevy trax rear brake rotors

a couple years ago i did a brake job on my daughters 2016 chevy trax. the rotors were in great shape, so i kept them for the next brake job....she traded off the car. so, i have a pair of rear rotorsthey are different from the frontsthat measure 13 mm thick, minimum is 10 mm, so there is lots of wear left. there is surface rust that can be sanded off or just run them and the rust will go away. ebay wants $53 n change. i want $20. your choice. jim 231-499-6960