Well, each week he goes from primary to special to heavy. Just last week it was special, so this week it will be a heavy weapon. There are only 3 exotic heavy weapons. One of them is locked as an exotic bounty only. That leaves 2 to be sold. Truth or GJALLARHORN. 50/50 chance. He sold Gjallarhorn the first time and the Truth the second time. My prediction is he will sell Gjallarhorn. Imagine all the forums with people raging about how they "earned" theirs through RNG. Edit: I forgot about Thunderlord, so a 33% chance. I render my topic invalid. GG Edit 2: Xur sold Truth. I was wrong :/// but I was close. Everyone can smd saying he would sell primary/special