Acer via eBay offers its factory-refurbished Acer AXC-703G-UW51 Intel Celeron 2GHz Quad Desktop PC, model no. DT.SX2AA.001, for $169.99 with free shipping. That's $86 under the lowest total price we could find for a new one. (It's also a low price for a desktop with a Bay Trail CPU.) Features include an Intel Bay Trail Celeron J1900 2GHz quad-core processor, 4GB RAM, 500GB 7200 rpm hard drive, Gigabit Ethernet, and Windows 8.1. A 90-day Acer warranty applies.