Honestly I think they won't let Xur sell it for one reason, to keep players playing. It gives players a reason to play. People will keep playing till they get the mythical Gjallarhorn. I could care less if they sold it but if they did that would make them lose players because of the fact that every player would have one. Meaning, they finally got the weapon they've been hoping to get for forever. And then the play time of multiple players will go down and Activision wouldn't want that. They want the play time to go up, how else is this game gonna last "ten years" like they're hoping it will. Just my theory though. More power to the player though.. Hopefully Xur isn't a total dick next weekend. Happy hunting Guardians.