Is Gamestop going the way of the Dinosaur?

Is big box used game purchasing on the decline? Gamestop has always held a close place in my heart when it comes to buying used videogames, in fact, one of my first and fondest memories of gaming is when I purchased a used Sega Saturn at Gamestop for $70 USD. For many years Gamestop has been the go-to place to purchase all your new and used games, but the formula is being challenged.