Microsoft Store offers the Samsung ATIV One 5 A6 2GHz 21.5" Touchscreen All-in-One Signature Edition Desktop PC, model no. DP515A2G-K02US, for $599 with free shipping. That's tied with our mention from last week and the lowest total price we could find by $193. Features include an AMD A6-5200 2GHz quad-core processor, 21.5" 1920x1080 (1080p) touchscreen LCD, 4GB RAM, 1TB hard drive, Gigabit Ethernet, 802.11n wireless, Bluetooth, USB 3.0, HDMI, and Windows 8.1 64-bit.