So I've been lurking in the classifieds in hopes of a unicorn (aka xds 9 4.0) to show up so I can buy my first gun. But it seems like half of what I've seen go up for sale is .40 handhuns of one sort or another. Why does it seem like so many are dumping .40? My guess would be the cost of ammo but Im I'm not to up on all that. Anyone else have a theory?