This has to be an error but Amazon honor what ever price you preorder at. I've just preordered 5 of these as word is the real price will be £44.99.
http://www.amazon.co.uk/VITA-Memory-Card-16GB-Model/dp/B006H3PT50/ref=zg_bs_676490011_1
http://www.gamefaqs.com/boards/620272-playstation-vita/61353128
http://www.amazon.co.uk/VITA-Memory-Card-16GB-Model/dp/B006H3PT50/ref=zg_bs_676490011_1
http://www.gamefaqs.com/boards/620272-playstation-vita/61353128