I'm kind of curious too-
A couple years ago, I picked up a box o' parts at a garage sale for $4.
I've sold 2 sets of bar end shifters for $35 and gave a set of decent (metal) platform pedals to my brother.
I was looking through it a few days ago and found a Brooks Professional that's a little worse for the wear! It has a small cut between 2 rivets near the rear corner edge, plus rust on the bottom.