Walmart.com offers the Lenovo IdeaCentre A300 Intel Pentium Dual-Core 2.2GHz All-in-One 21.5" Widescreen Desktop PC, model no. 40181DU, for $498. With $5.97 for shipping, that's the lowest total price we've ever seen for any IdeaCentre A300 all-in-one PC. This desktop features an Intel Pentium Dual-Core T4400 2.2GHz, a 21.5" 1080p widescreen LCD, a Bluetooth mouse and keyboard, a webcam, Windows 7 Home Premium 64-bit and more. Sales tax is charged in most states.