Looking for some look keo pedals (pun intended).

would ideally like to trade either my 105 or ultegra (6610) pedals. but would consider buying a set for what i can sell one of these for. don't need carbon ones. the classics are fine. both sets i have are used, but not beat to the ground. looking for similar condition. only want to trade because of cleat compatibility - want to keep em all looks. i thought they were cross-compatible, but i cannot clip the look cleats into the shimano pedals.

here are some pics:
105
https://lh3.googleusercontent.com/...Kg/s640/P6210443.JPG
https://lh4.googleusercontent.com/...zc/s640/P6210444.JPG

ultegra:
https://lh3.googleusercontent.com/...0/ultegrapedals1.jpg
https://lh4.googleusercontent.com/...o/s640/ultpedals.jpg