I missed out on a Clark Kent F12(i think it was an f12 anyway) frame on the bay a couple of years ago. It was badly photo'd, badly described, had a rusty chain dangling from it, some other random cr@ppy parts, and the decals were gone. Could just make out where they had been and it looked ok enough to take a punt on. It went for about £70 iirc and i nearly boiled over when my internet started playing up so i couldn't get a bid in at the last post.
Really nice bikes; mine is now full rigid

