To all those whining about Xur carrying their "earned exotic" how exactly did you earn it? The [u]random[/u] dropped engram, or the [u]random[/u] drop in pvp, or the [u]random[/u] drop from nightfall? You either get random drops for exotics or enough random drop of strange coins to buy them.
TL:DR
Suck it up if your exotic is being sold by xur.
EDIT: Can someone from the other side of this argument explain their argument because I really cannot see why you think like this.
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I was lucky to have the Suros Regime and Red Death a few weeks before Xur sold it. If there's one thing I learned, it's to not pride yourself on any exotic in this game, because Xur will have it eventually.