The possibility of it happening that many times in a row yes. Rare however it's still 16 percent every week that it could be anything next week there's a 16 percent it's void fang again Edit: not saying it doesn't such I started with a hunter and now I have 3 level 30 of each class and I have every hunter exotic armor but I bought every one so I am lucky that he's sold each one but at the same time I found 0 for a hunter before it was already bought I have about 250 hours logged and most of it is with my hunter that's why I like that xur is in the game granted for other classes he sucks but so does rng