Notice that all the seasons of Angel and Buffy are for sale, except Season Seven. I should note that this was the front shelf section and the shows started over at 'A' in the main aisles. I was pleased to see Buffy still meriting such placement.
So way no Season Seven? They weren't sold out; the labels and semi-permanent stickers only counted up to six on the shelves. Maybe it was the mess of the plot and hash of dropped character threads rendering even a faceless multinational retailer too embarrassed to sell such mish-mash.