Acer AspireRevo AR3700-U3002 Ultra-Compact Desktop PC for $299.99 shipped.  Here is a screenshot for your reference.  This is certainly not the fastest PC around.  Instead, it is extremely compact and energy efficient.  This desktop PC measures 7.1" x 7.1" x 1.2" and features an Intel Atom D525 CPU at 1.8GHz, 2GB RAM, 250GB hard drive, [...]