Regarding the rebluing and what it "does" to the "value", I group that in with the same sorts that insist that repairing and refinishing antique furniture to make it USABLE is totally problematic and destroys any inherent value it had as an antique, never withstanding that the table would fall over if you sneezed in it's general direction beforehand and was pretty much useless as a table in even the loosest definition of the word. Or the similar idea that certain hobbies can only be enjoyed in certain ways, like old video games only being played on actual CRTs (notwithstanding the bulk, weight and power consumption), or pre-2004 pinball machines not having the bulbs replaced with LEDs in bulb-like connectors.

Oh, sorry, that started turning into a rant.