CowBoom offers the used Dell Inspiron 3455 AMD A8 2.2GHz 23.8" 1080p All-In-One Desktop PC for $299.99. Coupon code "INSPIRON12816" drops the price to $199.99. With free shipping, that's $504 under the lowest total price we could find by for a new, similar unit. (For further comparison, it's also tied with our mention of a similar desktop from three weeks ago, which only had 4GB RAM and a lesser CPU.) It features an AMD A8-7410 quad-core 2GHz APU, 23.8" 1920x1080 (1080p) IPS LED-Backlit LCD, 8GB RAM, 1TB hard drive, DVD burner, 802.11n wireless, Bluetooth 4.0, USB 3.0, HDMI, and Windows OS (version varies).

Note: No warranty information is provided, and this item will have minor to moderate scratches and/or be missing accessories.