Northwest Outdoor via eBay offers the open-box Fitbit Charge HR Wireless Activity and Sleep Tracker in Black bundled with the Fitbit Aria Wireless Smart Scale in Black or White, model no. FB201, for $129.99 with free shipping. That's $75 under the lowest total price we could find for new items purchased separately elsewhere. The tracker features 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 S or L. The scale measures weight, body fat percentage, and body mass index; it uploads the information for use online or via the Android or iOS app.

A 90-day warranty applies, although it's unclear who backs it.