TigerDirect offers the Zotac ZBOX Intel Atom 1.8GHz Barebones Mini PC, model no. ZBOXSD-ID12-U, for $159.99. This $20 mail-in rebate drops it to $139.99. With $5.43 for shipping, that's the lowest total price we could find by $14. Features include an integrated Intel Atom D525 1.8GHz dual-core processor, 802.11n wireless, memory card reader, six USB 2.0 ports, HDMI and VGA outputs, and more. Note that this system doesn't include RAM, a hard drive, or an operating system.
Rebate ends August 31.