Nice "preproduction prototype" Model 5904 from the Automatic Improvement Program (AIP) and added to S&W's inventory in Oct, 1988. Comes with original box, papers, tools, chamber flag, and two magazines. It has been fired but is still in really nice shape. Has (dim) night sights which I don't think were on it when it originally shipped.
More pictures >here
SPF - $700
$600.00 + $25.00 USPS shipping to your FFL.