Advantages of Apple refurbished:
You get the name on the receipt, meaning your name for Apple service, can buy AppleCare, fresh one year warranty and most times, Apple refurbished is a new product that was returned literally days after purchase and re sealed for you.
You can also buy the 16GB upgrade.
This "sealed" Retina, how do you know it's really sealed? I can replicate a shrink wrap in fifteen minutes. How do you know it's the real thing? Gonna open it? It's not sealed anymore. When was it purchased? Last week? Why wouldn't they return it since no restocking fee? Purchased passed the return date? Why keep it sealed?
I have a lot of curiosities when someone is offering me a sealed product at a loss they could easily recoup with a standard return.