"Earned it" is a pretty lame statement. You mean you got lucky and the RNG gods were nice enough to drop it for you. Some of us who have 500, 750, even 1000 hours plus of gaming on that game have never been so lucky. Plus wouldn't buying it from Xur also be "earning it?" You have to "earn" enough strange coins to be able to purchase the weapon. Strange coins don't just appear in my account. It's not like everyone in the game can just buy all the exotic stuff every week. I would be kind of disappointed if he did sell it mainly because PvE would be broken, kind of like why I don't want him to sell the Last Word because then PvP would be broken.