Gravity Buys via eBay offers the open-box Google Nexus 10 16GB 10" Android Tablet in Charcoal Gray, model no. GT-P8110HAAXAR, for $169.99 with free shipping. (Square Deals Inc via Amazon has a refurb for the same price.) That's $10 under our mention from March, $310 off list, and the lowest total price we've ever seen for this model in any condition. This 1.33-lb. tablet features a 10.1" 2560x1600 touchscreen LCD with Corning Gorilla Glass 2, Exynos 5 1.7GHz dual-core processor, 2GB RAM, 16GB memory, 5-megapixel rear camera with 1080p video recording, 1.9-megapixel front-facing camera, 802.11n wireless, Bluetooth, micro-USB, micro-HDMI, and Google Android 4.2 OS (Jelly Bean).

Update: Gravity Buys deal has dropped to $159.99 for its open-box offer and Amazon has dropped the price on its certified refurb to $149.99, both with free shipping.