Lego terms and cond say....
What if the website shows a wrong price? We do our best to ensure that all prices on our website are accurate. However, errors can sometimes occur. If we discover an error in the price of products you have ordered, we will inform you as soon as possible and give you the option of reconfirming your order at the correct price or cancelling it. If we are unable to contact you or you do not reconfirm the order, we will treat the order as cancelled.
So here's hoping the don't notice