Cowboom offers the used Microsoft Surface Pro 3 12" 128GB Windows Tablet in Silver, model no. MQ2-00001, for $439.99. Coupon code "COWBOOM20" cuts the price to $419.99. With free shipping, that's $360 below our mention of a new unit from August and the lowest total price we've seen for it in any condition. (It's also $184 under the best price we could find for a new unit today.) It features an Intel Core i5-4300U 1.9GHz Haswell dual-core processor, 12" 2160x1440 multi-touch LCD, 4GB RAM, 128GB internal flash storage, 802.11n wireless, Bluetooth 4.0, 5-megapixel front- and rear-facing cameras, microSD card slot, USB 3.0, and Windows 8.1 Pro. (It doesn't include the keyboard cover.)

No warranty information is provided. Also, it may have scuffs, surface scratches, dents, or other cosmetic blemishes and is missing the originally included cables.