Lenovo offers its factory-refurbished Lenovo H500s Intel Celeron 2.4GHz Desktop PC, model no. 57RF0550, for $150.53 with free shipping. That's $309 off list and the lowest total price we could find. Features include an Intel Celeron J1800 2.41GHz Bay Trail dual-core processor, 4GB RAM, 500GB 7200rpm hard drive, DVD burner, 802.11n wireless, and Windows 8.1 64-bit. A 1-year Lenovo warranty applies.