Meanwhile, Transversive Steps have only been sold one time, almost one year ago.
Get good Bungie.
Edit - My account has 2,500+ hours played. I am only missing one exotic. Guess which one.
[spoiler]If you believe Xur's inventory is random, you are naive.[/spoiler]
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The only thing you need from Xur is 3oC, have a couple of them popped at all times you will soon not care what Xur sells because you will have all exotics.