Some recent fitness auctions on eBay:

Fitbit Ionic Smartwatch Fitness Activity Tracker One Size (S&L Bands Included)

$239.99
End Date: Friday Jun-8-2018 16:16:04 PDT
Buy It Now for only: $239.99
Buy It Now | Add to watch list

Fitbit Charge 2 Heart Rate Monitor Fitness Tracker Wristband - All Colors
$127.99
End Date: Friday Jun-1-2018 13:51:47 PDT
Buy It Now for only: $127.99
Buy It Now | Add to watch list