Edit: The dream is over. The price is now listed as $56.64
I just went on Amazon US to look at the kindle daily deals and noticed the current #1 bestseller in the Kindle Store is Harry Potter: The Complete Collection. All seven books for $14.99. It's produced by Pottermore, which recently started selling the Kindle versions on Amazon individually for $8.99 each, so I'm not entirely sure I'm not dreaming.
In case I'm not dreaming, I went ahead and bought it, watched it download into my Kindle, played around with the navigation in the table of contents, and obsessively refreshed my email until the order confirmation came through, reaffirming that I just bought ALL SEVEN HARRY POTTER BOOKS FOR $14.99. *flails*