@memoryval wrote:
Where is the trick? How some sellers can offer this card at 30GBP? Easy… They sell in " bulk" format, that means the card goes without retail package and in such case you will never know 100% if your card is brand new or used or… hacked. In that case my advice is to buy from trusted sellers, and to buy only RETAIL PACKED items from SanDisk.
As far as I know SanDisk only sell in “bulk” to the mobile manufacturers (HTC, Samsung, Nokia, etc…) so they can put the cards in the same box when you buy a unlocked cellphone. Of course there are many distributors who can import these cards in bulk and sell them at very cheap price, but these are NOT OFFICIAL selling channels and are not under full control of SanDisk distribution channels.
Another reason not to buy any memory card sold in “bulk” (not retail) packaging is that SanDisk does not warranty these cards. So while you may get a genuine card for what seems to be a good price, if that card fails you have no recourse against anyone or avenue to get it replaced. You’ll just have to buy another card. Buying 2 cards instead of one as a result is no value. 
