With regard to the pre-order unavailability, I own a boutique retail shop that sells allocated items (in other words new release items that are in limited supply so distributors allocate them to vendors based on various factors such as volume and account upkeep), and what I am seeing here is similar to what I see in my shop. I just figured Apple could do it so much better. Often, we plan to order say 400-450 qty of an item and we figure our allocation may only end up being half of that, so we ask our distributors for 500 total in hopes of getting 250-450 of them, and we will cut off pre-orders at 150 and plan to keep the other 100 for store stock to put out piecemeal every day until the second wave of shipments, since customers understand a preorder sellout but aren't happy about bare shelves a week after release. But we won't get our final allocation numbers on the orders until sometimes only a week or two until release, and there have been times when we barely fulfilled pre-orders because we were cut tighter than expected. Other times we got all we asked for and had to make sure we scrambled to sell through enough of it to meet our net terms (though with allocated items it's rare that you wouldn't succeed at that because if there weren't tight demand there wouldn't be an allocation). It's just how things work where there is a high degree of manufacturer control over a high-demand item. The best strategies for coping with allocated items are to pre-order as early as you can stand to, and if your pre-order doesn't make it on time for the first wave of shipments, prepare to hunt for it at retail instead.