Quality Cellz via eBay offers the Unlocked Apple iPhone 6 Plus 16GB Smartphone for GSM Networks (no contract) in White, model no. MGAM2LL/A, for $519.99 with free shipping. That's $160 under our mention of a new unit from last May and $230 less than a new unit today. (We saw a similar refurb for $30 less in January.)