Where can i buy cheap Iphone 5?

I need to buy an iPhone 5 for my sohn, i would like to find an reasonable price. More reasonable than Ebay. One of my friends can sell a factory unlocked 16GB for 670$ and buys it outside from Greece(without contract). He has a profit of 50-70$ and i would like to find the source for cheap iPhone 5.
I DO NOT WANT CONTRACT.

Added (1). Do you know some sources.

Added (2). There are no cheap iPhones on Amazon or Ebay. Craiglist sellers sell localy and there are a lot of scammers. You may know a not well known site or someone who has access to sources.

Umm i believe you could buuy a cheap one in amazon

Look on the internet for refurbished phones they are cheap

NOT Amazon - EBAY! Ebay's the best place to buy amazing new or used items.

I just got an iphone 5 and love it! The only thing is I'm in a contract, or my parents are in a contract. Before our contract went up I checked craigslist and ebay. You are not going to find a brand new one for cheap on Ebay, but you may find one on craigslist.

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