I got mine this week from nightfall as well, my first one, and I've been playing since the beta. I was like you screaming, jumping, hugging my wife etc.. However, if Xur sells it I could care less. Everyone who earned their strange coins deserves it just as much as me getting it from the nightfall. Gjally isn't earned, its RND. Now Thorn or Bad JuJu is earned, for that I would agree and Xur will never sell those exotics.