The Samsung Gear Fit2 is available over on eBay for as low as $79. Now this is for an open-box model, which means it was bought and then returned, so it's not technically a refurbished or used model. However, if you are wanting a brand new Gear Fit2, eBay also has one for $99. So you can choose whichever you want to pick up.
Samsung's Gear Fit2 is their latest fitness tracker which runs on Tizen. It is compatible with all Android smartphones, and it works with Samsung's S Health application, which is available in the Google Play Store. It will track your activity, as well as your heart rate. Of course, since it gets your heart rate from your wrist, it won't be as accurate as something that is wrapped around your chest. Additionally it will send you your notifications to your wrist. So you can see if you have an incoming call, and also see who is calling you. It has a full color display which is slightly curved. The Gear Fit2 will last around 3-4 days before needing a recharge.
eBay is offering up free shipping on both listings of the Gear Fit2. You can pick up the open-box model for $79, or the brand new one for $99 using the links below.