CowBoom offers the used Microsoft Surface Pro 3 12" 64GB Windows Tablet in Silver, model no. 4YM-00001, for $629.99. Coupon code "Surface343015" cuts it to $479.99. With free shipping, that's $170 under our mention of a new tablet from last month and the lowest total price we've seen for this model. (It's also $259 below the best price we could find for a new one.) It features an Intel Core i3-4020Y 1.5GHz Haswell dual-core processor, 12" 2160x1440 multi-touch LCD, 4GB RAM, 64GB internal flash storage, 802.11n wireless, Bluetooth 4.0, 5-megapixel front-facing camera, USB 3.0, and Windows 8.1 Pro. Coupon expires April 30.

Note: These tablets may have minor to moderate scratches or scuffs and include original or replacement accessories. No warranty information is provided.