Best Smartphone I can get for 400 - 500 or lower

Solution
THE BEST:

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Google Nexus 5 (sold by Google) - http://www.amazon.com/Google-Nexus-16GB-Black-Unlocked/dp/B00GDBN6KQ/ref=sr_1_1?ie=UTF8&qid=1398818249&sr=8-1&keywords=Nexus+5

There's only 1 left in stock. Get it fast!