BuyDig offers the Garmin Vivofit Fitness Band with Heart Rate Monitor in Red, model no. 010-01225-38, for $57. Coupon code "FIRST10K" cuts that to $39.99. With free shipping, that's $8 under our June mention the lowest total price we've seen. (It's a current low by $21.) This activity tracker monitors your calorie intake, steps, distance, and sleep. The heart rate monitor syncs wirelessly to the fitness band via Bluetooth.