There's gotta' be SOMETHING wrong with the Benellis--Ga State Patrol put 'em in service several years ago, and within 6 or 8 months had gone back to 870's--Dunno???
Looks like a Five-Screw Pre-Model 10, aka the "Military & Police", and ANY functioning S&W K-Frame is worth AT LEAST $250, no matter WHAT it looks like...