I just recently upgraded my rear brakes so I don't need these anymore. I paid 80 bucks for them from R1 concepts new and they only went through 1 set of pads. No discoloration, warping, anything like that..these work perfect.
when they were new:
^yeah those are duralast pads = lousy brake coefficient so easy on rotors lol the rotors are just a little darker and dirty from brake dust
$35 located in socal in the IE/Pomona area