Price Range: $11.99 – $35.00 eBay remains the cheapest source, with individual used trackers starting as low as $11.99 . It is also the best place for deep discounts on bundles or "for parts" units if you only need the tracker module itself.
Price Range: $43.00 – $50.00 Mercari often carries "like new" or professionally cleaned refurbished units. Recent listings for the Alta HR have been seen at approximately $43.32 . cheapest place to buy fitbit alta
Since these devices were released in 2016-2017, used units may have significant battery degradation. Price Range: $11