Good find. These mags are going for $100 scalper prices on the auction sites.
I just took delivery on a M&P Pro 9L about an hour ago---looks like I need
to decide if I want to pay semi-scalper price for some mags. MSRP
is $42, and real world prices before the craziness was around $35, so
$60 really isn't totally a rip-off.