Ustation via eBay offers this TPU Rubber Ultra-Thin Transparent Skin Case for iPhone 6
in six colors (Black pictured) for 99 cents
with free shipping
. That's tied with our mention from a week ago as the lowest total price we've seen for such a case. (It's also a current low by a buck, excluding other eBay sellers.) It features TPU construction.
Note that this item ships from Hong Kong and has an estimated delivery time of two to six weeks.