Should be simple, Sony just didn't deliver many PS4 PROs the last months so that Gamestop needs to pay more for used ones to get at least those. But Gamestop has enough new Xbox One X consoles because MS ships enough. That means Gamestop doesn't have to tell every customer “we don't have it new but you can buy a used one“
If Sony would ship twice as much and less people would need to buy a used console, Gamestop wouldn't have to try so hard to get used ones.







