Amazon offers the FitBit Zip Wireless Activity Tracker in Lime for $47.99 with free shipping. That's $3 below our January mention and the lowest total price we could find by a buck. It tracks steps, distance, and calories burned and then wirelessly uploads data to your computer or phone so that you can see graphs, set goals, track progress, and post results to social media outlets.
Update: It's available in Magenta for $46.92 with free shipping.
BuyDig offers the FitBit One Wireless Activity + Sleep Tracker in Black, model no. FB103BK, for $101. Apply coupon code "VMEHILI" and check out with V.me by Visa to cut the price to $77. With free shipping, that's tied with our mention from three weeks ago as the best post-holiday price we've seen. (It's a current low by $11.) This device features Bluetooth 4.0 and a silent alarm; tracks calories burned, steps taken, distance walked, and stairs climbed; and monitors sleep.