Surface 2 in Microsoft Store - Why can't you purchase?

The Surface 2 has been out of stock in the Microsoft store for at least 3 weeks. Instead of having the site give you an "out of stock" notice....why don't they let you order the device, but tell you the device will ship to you a couple weeks later due to overwhelming demand. Seems stupid to give up a possible sale just because it will take a few weeks to get them back in stock. Especially since the landing page has a button that says "buy now" (but when you click through it tells you both models are out of stock). Just my 2 cents.