Where to buy Nikon d3100?

I'm living in India, D3100 costs $730(Rs.32, 950) here,
My cousin is living in USA,
Weather i wanna bye in India itself or it is good to bye it through my cousin Living in USA,

Warranty is an important parameter to buy, Please Tell me weather Nikon has international warranty or not.

If I remember correctly, Nikon has one of the most stringent warranty policies. If you had the camera in India and needed warranty work, it would need to be shipped back to the USA.

It would be best to buy the camera from a reputable shop where you live.

If you'd import a nikon from the USA you'd have no warranty in India. Additionally the Indian customs may charge you import duties. Nikon makes a select few models with international warranty, last I heard they sold those in some airport duty free shops. Prices in those shops are rather high though.

You should buy it form amazon

Nikon D3100 14.2MP Digital SLR Camera
* 14.2-megapixel DX-format CMOS image sensor;
* 3-inch monitor with One-Touch Live View shooting and movie capture
* Full 1080p HD Cinematic Video with full-time autofocus and sound
* Easy-To-Use Nikon Guide Mode with intuitive controls and on-board assistance