I just got myself one of these for the kids, it was in excellent condition and works really well.
Also my first piece of Apple Hardware after avoiding it for years.
I went for the Grade B and it was almost perfect, the deals on the IPad 3 seem particularly good VFM compared to the Ipad 2 without Retina Display.
If you want something a little cheaper try:
Apple iPad 3 16GB WiFi 4G - Black - Locked to Vodafone / Lebara - Grade B - £139.99http://www.smartfonestore.com/buy_iPad_Apple+iPad_Vodafone_3+16GB+WiFi+4G_Black_B.aspx
Also don't forget Quidco, they have paid me the £5 the last couple of times I bought phones from them.