I reckon Xur should sell it, it's a neat rocket launcher that everyone should use at least once, and if I could I'd be giving my spare Gjallarhorns to people honestly. I don't even use the darn thing, actually XD I find my Ice Breaker more useful for random situations most of the time. But just of note, the so-called 'value' people mention isn't actually value, but basically 'bragging rights'. This ain't TF2 where people go crazy over item values since, y'know, they're actually worth money. The only value the Gjallarhorn has is that which the players put into it. FYI, that's just an opinionated statement so take it with a grain of salt if you must. (And I do put value in other weapons myself, I'll admit to that. For example, I know the SUROS Regime has been nerfed to hell recently, but I still want one for the last weapon in my Exotic collection XP )