N2s, that was my first thought - that it could be welded, retempered, and restored to readiness.
I know John Powell and you go by the clean it, oil it, and leave it as it is theory that collectors go by, to hold it's value, but I hate to see a piece like that stay broken. My pieces such as the Khyber knife/sword Sarge sent get cleaned, oiled, and then lightly touched with a diamond hone to restore their sharp edge.