$399.20 to be precise. And it's free delivery!
But it's a teensy bit more complicated than normal. Full details can be found here, but the deal basically works as follows...
You have to make the purchase on Target's eBay store and when it comes to checkout use the code CTREAT20. That reduces the price to $399.20. Pretty simple stuff.
Also — it's the fancy new white one which may or may not appeal to you. I have a black PS4 but I'm always jealous of the people who have the white one!
I will say, however, that some of the PlayStation 4 deals you can find in-stores can often work out to be better value than getting a cheap standalone console, particularly if you can get a few good games bundled in. Your mileage may vary.
But if you're looking to just buy a PlayStation 4 with no frills, this is a pretty amazing deal.