Aesthetically, it's not in great shape. They are not real common, so if I was dead set on having a 15-125, maybe I'd buy it. I believe you can find a better example of the 15-125. I had a 15-125 at one time that I sent to Leon. It looked about like that. If pushed, I would guess that it's worth $25.00.
I'm one of those people who would prefer a pretty 15-91 to an ugly 15-125.
bkay