This really seems too good to be true but Bass Pro and Cabelas have the Sig P320 X-Carry with a Romeo1 Red Dot for $649. The cheapest I've found just the gun is about $599 online and the Romeo is $299 at Optics planet.
https://www.basspro.com/shop/en/sig-sauer-p320-xcarry-coyote-semi-auto-pistol-with-romeo1-sight
https://www.basspro.com/shop/en/sig-sauer-p320-xcarry-coyote-semi-auto-pistol-with-romeo1-sight