Platinum Micro via Rakuten offers the Fitbit Charge HR Wireless Activity and Sleep Tracker in Tangerine for $52.99 with free shipping. That's the lowest price we could find by $10, although we saw it for $15 less in June. Features include continuous heart rate monitoring, step-, distance-, sleep-, and calorie-tracking, time and date display, and wireless sync with supported computers and smartphones. It's available in size L only.