Tiger Direct has the Asus Essentio CM6730-US010S 3rd Generation Core i5 16GB Desktop for $650 + $15 average shipping = $665 shipped. Shipping ranges from $11 to $18. Offered around $743 and up through the web. Includes keyboard and mouse.
Intel Core i5-3350P Quad 3.1GHz, 16GB DDR3, 1TB HDD NVIDIA GeForce GT 640 3GB, HDMI, 2 x USB 3.0, Win 8 64x