Pics below are my standard, plain Jane, run-of-the-mill 1977 Model 14-3. It's 98% if I remove the Flaig Ace #21 trigger shoe it came to me with.
I would say this gun would probably get $650...maybe $750 if it were in a LGS case only because there are NO decent S&W's in any LGS case around here.
If someone wants to bring ammo and meet me at the local indoor range............I'll let you shoot my 14-3 in SA mode all day long, at no extra markup.
Even with a Letter, I can't see reaching that far just now...maybe in 6 months or a year.