even if your order goes through, they may still refuse to accept your order. From their website:
Order acceptance policy: The order acknowledgement is not a contract and does not constitute an acceptance of your order, but only a record of your offer to purchase a particular item at a particular price.
After you place an order, Crucial Technology will determine whether or not to fill the order, and Crucial Technology may refuse or limit your order for any reason. By placing your order, you agree to accept all terms and conditions set forth anywhere on this site, including Crucial Technology's terms and conditions of sale.
Crucial Technology reserves the right to accept, refuse, or limit your order for any reason, including, but not limited to, credit review, the unavailability of a product or errors in the prices and product descriptions posted on this web site. By placing your order, you agree that Crucial Technology's total liability, under any legal theory or claim, shall be limited to the purchase price actually paid to Crucial for the product giving rise to Crucial's liability.