Gadget Giant Google Nexus 7 Asus Tablet (7" inch) 2012 - S Line Gel Grip Silicone Case Cover & LCD Screen Protector (Black) £2.94 @ amazon marketplace
I posted this previously at £3.74 and it got over 200 degrees.
It's now down to £1.98 incl postage so thought it was worth a repost.
I bought this from the original deal and it's a good case. Tight fit and very resistant to scratching. I've had it's smaller brother on my S2 for a year now and no problems with it at all.
Now increased to £2.94. That's the law of supply and demand for you :-)