Brutal reviews on Amazon for the “factory re-certified” units. Most arrive DOA or stop working within hours.
https://www.amazon.com/SB3821-C6C-Soundbar-Subwoofer-Certified-Refurbished/dp/B01LW94FFN/ref=sr_1_2?ie=UTF8&qid=1492540225&sr=8-2&keywords=Vizio+SB3821-C6C+38"+2.1+Soundbar+w%2FWireless+Subwoofer