Futuretrend01 via eBay offers this 6,000mAh Charging Case for Apple iPhone 6 Plus in Black or White for $17.50 with free shipping. That's tied with last month's mention and the lowest total price we could find by $22, outside of the price below. Note: Expect this item to take two to three weeks for delivery.

A close price: Goods Wholesaler via eBay offers a similar case for $17.99 with free shipping.