BuyDig via eBay offers the refurbished Jawbone UP Fitness Tracker
in Black, model no. JBR52a, for $19.99
with free shipping
. That's $10 under the lowest total price we could find for a new unit, although we saw a new one for $5 less last month. It's compatible with the Amazon Fire phone (RIP), Android 4.0 or later devices, or iOS 6.0 or later devices. It's available in sizes S to L. Deal ends December 10.
Note: No warranty information is provided.