Northwest-Outdoor via eBay offers the open-box Fitbit Aria Wireless Smart Scale in Black or White, model no. FB201, for $66.95 with free shipping. That's $3 under our July mention and $35 under the lowest total price we could find for a new, sealed item. This scale measures weight, body fat percentage, and body mass index, and uploads the information for use online or via Android or iOS app. Four AA batteries are required and included.

Note: A 6-month Northwest-Outdoor warranty applies.