The once mighty department store chain has been selling off real estate and getting rid of various divisions in the past few years, while sales have continued to fall. During fiscal 2013, same-store sales fell 3.8 percent while revenue declined by $3.7 billion and there was a $681 million loss on gross margins. The question has long ago stopped being whether Sears will disappear, according to retail analysts. It’s now a question of when it will fall.