Walmart offers the Fitbit Flex Wireless Activity and Sleep Wristband in Pink, model no. FB401PK, for $79 with free shipping. That's tied with our expired mention from five days ago in a different color and the lowest price we could find now by $14, outside of the mention below. It tracks your daily activity and sleep patterns to help you attain your fitness goals. It includes large and small wristbands.
A close price: Microsoft Store offers it in Slate for a buck more with free shipping.