Pangea Deals via eBay offers the refurbished No-Contract Apple iPhone 6 Plus 16GB Smartphone for AT&T in Space Gray, Gold, or Silver for $549.99 with free shipping. That's tied with our May mention as the best price we've seen. (It's also a current low for a refurb by $75.)

Note that no warranty is provided, but it's covered by a 30-day guarantee. Additionally, this item doesn't include headphones, the user manual, or original box.