nikatronics via eBay offers the open-box Apple Watch Series 2 42mm Aluminum Sport Smartwatch for $289.84 $279.89 with free shipping. That's $9 under the lowest price we could find for a sealed unit, although most vendors charge at least $329. (We last saw it for this price in June.) It features an aluminum case, Ion-X glass display, dual-core processor, heart rate sensor, accelerometer, gyroscope, microphone, speaker, 802.11n wireless, and Bluetooth 4.0.

Note: This is new, but may not come in its original packaging. An Apple warranty is said to apply, but it's unclear how long it covers.