860+ rewards from BG's, sometimes a random 880 item and the weekly "cap" rewards 895 items.
Meanwhile you get way better items by just doing world quests, dungeons, LFR, invasion vendor etc. And it's faster too.
On a fresh 110 I got to 908 in just 2 weeks of playing all of the above while I would be stuck somewhere 870-ish if i would just pvp.
Might as well just make pvp gear a 100% transmog only.