Mywit via Amazon offers the refurbished Samsung Gear S2 Smartwatch for T-Mobile in Dark Gray, model no. SM-R730T, for $109.99 with free shipping. That's the lowest total price we could find for refurb by $15, although we saw a refurb for $10 less in August. Features include an ARM Cortex-A7 1GHz dual core processor, 1.2" 360x360 touchscreen, 512GB RAM, 4GB internal storage, WiFi, 3G or 4G connectivity via T-Mobile (data plan required), Bluetooth 4.1, 42mm stainless steel case, and elastomer strap.

A 90-day warranty applies but it's unclear who backs it.