The EV-30 Tumbler Sparrow was only offered for a limited time. The offer expired on January 15th, 2015 at 1 AM PST.
https://www.bungie.net/en/Help/Article/12410
English
-
Can Xur sell it? (I just want all my friends to be able to have one also. It shouldn't matter when you bought it, only that you did!) I wouldnt be sore or feel robbed of my exclusive content. The Tumbler is quite fun