As one of its daily deals, A4C offers the used Samsung Galaxy Gear Fit Fitness Tracker and Smartwatch in Black for $39.99 with free shipping. That's $15 under our December mention of a refurb and the lowest price we've seen in any condition. (It's also $35 below the lowest price we could find for a new unit.) It tracks calories burned, distance traveled, steps taken, and speed. Features include a curved 1.84" Super AMOLED display, heart rate sensor, Bluetooth 4.0, and IP67-certified water resistance. It's compatible with most Samsung mobile devices. Deal ends today.

A 90-day A4C warranty applies. Note that it may have minor scratches and/or slight cosmetic defects due to prior usage.