Argos are selling off some refurbished Nexus 7 16GB tablets on eBay at the moment. The offer, which you can see in full here, includes a 12 month warranty.
Running Android 4.3, the tablet also has a 1.5GHz Qualcomm Snapdragon processor, 2GB RAM and a 1920×1200 pixel screen. This is the 2013 version, and although it’s listed as £129.99 here, you can get it down to £117 when you check out, as there’s 10% off.