Cellfeee via eBay offers the refurbished Unlocked Apple iPhone 6 Plus 16GB GSM Smartphone in Space Gray, model no. MGAL2LL/A, Silver, model no. MGAM2LL/A, or Gold, model no. MGAN2LL/A, for $409.99 with free shipping. That's $41 under yesterday's mention and the lowest total price we've seen for this unlocked phone in any condition. (It's also $140 under the best deal we could find for a new one today.)
No warranty information is provided. Note that this item will have minor scuffs or scratches and comes with a non-OEM charger.