BuyDig offers the Lenovo ThinkCentre M72z Intel Pentium Dual-Core 2.9GHz 20" All-in-One Desktop PC, model no. 3548F4U, for $399. Coupon code "LNM72Z3548F4" cuts it to $299. With free shipping, that's the lowest total price we could find by $410. Features include an Intel Pentium Dual-Core G2020 2.9GHz Ivy Bridge processor, 20" 1600x900 LED-backlit LCD, 2GB RAM, 500GB 7200 rpm hard drive, DVD burner, Gigabit Ethernet, 802.11n wireless, Bluetooth 4.0, webcam, and Windows 7 Professional with Windows 8 upgrade.