A NIB Smith & Wesson M&P full size or compact should go around $500.00 to $550.00 USD, maybe $575.00-600.00 with 3 dot night sights.
My new MP45 Compact was approx $590.00 total. I got a free Glock tactical light, 60lum & a 2XL black T-shirt,
I did the warranty now I have to send in the S&W coupon to get the armed forces/veteran $50.00 rebate.
Note; I've seen the new SD pistols go around $300-375.00 NIB & the M&P Shield pistol sale prices are now decent. I wouldn't buy any since the pistol doesn't have a ambi-safety & Im left-handed.
S&W cut the tritium big dot front sight from the SD series, so that takes away from buying it over a stock M&P/M&P Compact to me.