Acer via eBay offers the factory-refurbished Acer Aspire AXC-603G-UW14 Intel Celeron Quad-Core 2GHz Desktop PC, model no. DL.SUVAA.002, for $159.99 with free shipping. That's the lowest total price we could find by $21. Features include an Intel Bay Trail Celeron J1900 2GHz quad-core processor, 4GB RAM, 500GB hard drive, DVD burner, Gigabit Ethernet, and Windows 8.1 64-bit. A 90-day Acer warranty applies.