has the Anker PowerCore II 20000, High Capacity Portable Charger with Dual USB Ports, Upgraded PowerIQ 2.0 (up to 18W Output) Power Bank for $29.99.
I found this when looking through Amazon Deal of the Day [amazon.com]
. It still has a little less than 24 hours of availability. I do not see it posted anywhere else, and NewEgg has it for $39.99 as their Black Friday deal. I picked one up as I've been looking for awhile!