In 10k kills I've looted about 12 pinks. Using 5 of them at 20 (all lvl 20 pinks) and sold the rest for about 200k collectively. Most have dropped from ghosts, don't forget to destroy EVERYTHING.

I'm 4k into 20, hoping to hit 21. Though with the news that guilds will be available soon and the assumption that iOS release will follow guild release in short order, I'm unsure if I'll make it or not. MIGHT take a little plat, we'll see...

EDIT: Spelling