Hi! I love these Sidis, but my knees did not. I wore them 40 minutes on the trainer and 1 1/2 hrs on the road, so they are like new, except for a tiny scratched spot on the sole of the right shoe on the toe area. I paid 140$ for them, and hadn't thought of a price yet. Let me know if you are interested, you can PM me! Thanks, Tokie