For in-store pickup only, Micro Center offers the Under Armour UA Band Activity Tracker in Black for $24.99. That's $35 under our October mention, a current best by $30, and the lowest price we've seen. (Some major retailers charge around $100.) It measures sleep, resting heart rate, steps, and workout intensity. It includes a case and is water resistant to 6.5 feet.

Note: You can order a maximum of two units at this price; afterwards additional units cost $44.99 each.