This Fitbit Flex Wireless Activity + Sleep Wristband drops from $99.95 to $89.95 at Amazon. Plus, shipping is free. This is the lowest price we could find by $10 (the next best offer we found is $99.95 with a $10 gift card at Walmart.com). This wristband is only available in slate at this price, and includes a small and large sized wristband. It tracks your steps, distance, calories burned, and more. Sales tax is charged in most states.