newegg offers the refurbished Gateway DX4870-UB318 Intel Core i5 3.0GHz Desktop PC, model no. DT.GDDAA.012, for $389.99. Apply coupon code "VME20BTS" and checkout via by Visa to drop it to $369.99. With free shipping, that's the lowest total price we could find for a refurb by $71. It features an Intel Core i5-3330 3.0GHz quad-core processor, 8GB RAM, 1TB 5400 rpm hard drive, Gigabit Ethernet, and Windows 8 64-bit. Deal ends September 9.

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