Soyan Tech via eBay offers the open-box U8 Bluetooth Smartwatch Phone Mate For Android in Black for $18.61 with free shipping. That's a buck less than our May mention of a new, factory-sealed unit and $2 under the lowest total price we could find for a new one. Features include a passometer, calendar, call sync, calculator, clock, and stopwatch.
Note: This item is new but does not ship in original packaging. Expect it to arrive in two to four weeks.