So again, in all seriousness, I was able to purchase the controller a few minutes ago even though it says it's out of stock. Here's what I did step-by-step:
1. Go the page for the controller here:
https://www.microsoft.com/en-us/d/x...-2-halo-infinite-limited-edition/90z8k1dbj8zd
2. When you first load the page, you will see a pre-order link for about a fraction of a second. If you refresh the page, you'll see it pop up again for the same amount of time. You have to be very quick, but refresh the page, scroll down and click "pre-order" before it disappears. It took me a couple of dozen times to do it, but eventually I managed.
3. Once you've managed that, the item will be added to your cart. Now you'll be at your cart, but unable to checkout because the item is "out-of-stock".
4. If you refresh the page here, you'll see a "checkout link" temporarily appear just as the pre-order link did in Step #2. So do on this page just as you did for the pre-order until you're able to click it.
5. Once that's done, you'll be on the 'Place Your Order" page. Here, it wouldn't allow me to select my address, so I just re-input it. Then I selected payment type and was able to successfully place my order.
I suggest you all give this a try as well.