I don't think I have seen a non night sight leaf with the silver top before...did this trait turn up around the E series? My D has a plain ol blued one. That part alone might be rare as hen's teeth.
That thing is just plain sexy. I find these much easier to shoot...even flipped down the night sights and associated mods to the front and rear sights makes for a cluttered sight picture...at least for me.
That would make a sweet addition to someones collection...I wonder what the reserve is? Seeing as the seller knows what they have, I bet it's pretty steep.