Why does Nikon D3200 have got 24.2 MP but sold for only $500?

Im looking to buy a camera and interested in this one.
im a beginner, looking for the one that's good for portraits.
is Nikon a good brand?
please advise me.
thanks

См. статью: Why does Nikon D3200 have got 24.2 MP but sold for only $500?