Amazon offers the FitBit One Wireless Activity Plus Sleep Tracker
in Black, model no. FB103BK, for $76.42
with free shipping
. That's an $11 overnight drop, the best we could find by $20, and the lowest total price we've seen since three weeks ago, when it was $1 less. This Bluetooth device tracks calories burned, steps taken, distance walked, and stairs climbed. It syncs with your computer or iOS or Android device.