BuySpry via eBay offers the factory-refurbished Microsoft Xbox One 500GB Console, mdoel no. 5C5-00001, for $179.99 with free shipping. That's $10 under our refurb mention from a week ago (which included two games) and the lowest total price we've seen in for a refurb. (It's $15 under the best price we could find for a refurb today.) It features a 500GB hard drive and Blu-ray player. A 90-day Microsoft warranty is included.
Note that it comes in a non-original packaging and does not include a controller.