I paid $329 for Xbone, Kinect, Ryse, Dance Central, and Kinect Sports Rivals. I could have chosen a different game than Rivals, but had to sell this as a Family Gift.

It was direct from MS, it is a refurbished Xbone. But I think it was the best deal I've seen.

If you wait really long, prices will drop. But the promos running now are good.
You know you can trade a 360 in to MS for $100 off Xbone? Can be combined with other deals.