Elike2014 via eBay offers the open-box U8 Bluetooth Smartwatch for Android and iOS in Black or Red for $11.48 with free shipping. (It's also available in White for pennies more.) That's tied with our mention from two weeks ago as the lowest total price we've seen for a U8 smartwatch. (Outside of other eBay sellers, it's a current low by $3.) Features include a passometer, calendar, call sync, calculator, clock, and stopwatch.
Note: Not all features are compatible with iOS.