BuyDig via eBay offers the refurbished Garmin Vivosmart HR+ Activity Tracker in Black for $79.99 with free shipping. That's $10 under our May refurb mention and the lowest price we could find for a refurb today by $50. This water-resistant tracker monitors heart rate, calories burned, distance traveled, steps taken, stairs climbed, activity intensity, and sleep quality. It features a 160x68 touchscreen LCD, inactivity alert, smart notifications for calls, texts, and e-mails, and 5-day rechargeable lithium battery. It's available in regular size.

Note: A 1-year Garmin warranty applies.