Ok so first of all, I got icebreaker from nightfall so I earned it. But your argument is invalid. Xur sold the best weapons in game the first weeks of the game. I don't care you didn't know how good they were at the time. They were still sold to an entire game full of "noobs" and if you didn't buy them, that's your fault. Stop bitching and get over it. When the new doc comes out, you'll have new exotics to "earn" and then eventually they too will be sold by xur. This will continue to happen so complaining won't help.