Thanks to all who have replied so far.
Evidently my speculation of the mid $400s for a lightly used, no box, 3913 TSW “9 Tactical” is in the ball park.

There seems to be no way to do a search on line of S&W LE distributors to find out if new one is on the shelf, or in the S&W vault. Wouldn’t that be a great innovation?

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Ipsis Rebus Dictantitbus