Newegg offers the refurbished HP 8000 Core 2 Quad 2.83GHz Desktop PC for $189.99. This $20 mail-in rebate cuts it to $169.99. With free shipping, that's the lowest total price we could find for a similar refurb by $52. Features include an Intel Core 2 Quad 2.83GHz quad-core processor, 8GB RAM, 1TB 7200 rpm hard drive, DVD burner, and Windows 7 Professional 64-bit. Rebate expires January 31.

A 1-year warranty applies, although it's unclear who supports it.