Refurbforless via eBay offers the refurbished HP Envy 750-114 Intel Core i5 2.7GHz Desktop PC, model no. M9Z92AA#ABA, for $365 with free shipping. That's the lowest total price we could find for a refurb by $92. It features an Intel Core i5-6400 2.7GHz Skylake quad-core processor, 12GB RAM, 2TB hard drive, DVD burner, 802.11ac wireless, Bluetooth 4.0, USB 3.0, and Windows 10 Home 64-bit.
A 90-day warranty applies, although it's unclear who backs it.