Amazon offers the Intel NUC Pentium Core Quad 1.6GHz Mini PC Kit, model no. NUC5PPYH, for $139.99 with free shipping. That's the lowest total price we could find by $3, although most places charge $175 or more. (For further comparison, we saw this bundled with 4GB RAM for $153 last October.) It features an Intel Pentium N3700 1.6GHz quad-core processor, support for up to 8GB RAM, 802.11ac wireless, Bluetooth 4.0, and four USB 3.0 slots. Note that this unit does not include an OS or hard drive but is compatible with Windows 7 and 8.1 and Linux.