The Amazon response was rather odd, see chat transcript section below:
07:55 PM(GMT) DC-K: Good evening
http://www.amazon.co.uk/Samsung-Essential-Memory-without-Adapter/dp/B00H0J8PTW/ref=sr_1_1?ie=UTF8&qid=1387217054&sr=8-1&keywords=microsd+128gb I'm pretty sure there's no such item
I think 64gb is the largest micro sd card available
07:56 PM(GMT) Janakiraman(CSA): I understand your concern.
07:57 PM(GMT) Janakiraman(CSA): I can see this item was sold by the seller The Orange Emporium.
07:58 PM(GMT) DC-K: and "Fulfilled by Amazon"
07:59 PM(GMT) Janakiraman(CSA): Yes.
08:00 PM(GMT) Janakiraman(CSA): In this case, I request you place the order for the item. If you are not satisfied with the item I request you to contact us. We will issue full refund and investigate on this product.
I politely declined...
That sounds incredibly fishy.
Also is the x5 out yet?