You should have kept that gun original. The 3" barrel was only offered early in production for couple years or less, Boomers pay big premiums for stuff like that.
I feel sorry for those poor schmos who refuse to make a gun into exactly what they want it to be, out of fear that will reduce its resale value. Life is too short to waste it as a self-deprived slave to financial considerations, only to enrich one’s heirs.