Newegg offers the refurbished Acer Aspire ATC-705-UC52 Intel Haswell Core i7 3.6GHz Quad Desktop PC, model no. DT.SXNAA.029, for $459.99 plus $1.99 for shipping. That's $240 off list and the lowest total price we could find. Features include an Intel Core i7-4790 3.6GHz Haswell quad-core processor, 12GB RAM, 1TB hard drive, 802.11ac wireless, DVD burner, and Windows 10 Home 64-bit.

A 90-day warranty applies, but it's unclear who backs it.