Xur is located at the Hall Of Guardians. Right down the stares in the middle of the tower and to the right of the vanguards table :D
Titan: The Armamentarium, 13 coins
Hunter: Crest Of Alpha Lupi, 13 coins
Warlock: Voidfang Vestments, 13 coins
Weapon: Suros Regime, 23 coins
Engram: Exotic Gauntlets
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YO -blam!- THIS, I NEED 1 MORE STRANGE COIN -blam!-