if you buy it from B&H or any other reputable camera store you can ask them to give you a no VAT certificate/VAT exmeption certficate (or whatever they call it in USA), after that before you leave the country you show it at the airport to get a refund for the tax you paid ... this only works if you are not a citizen of USA or working in USA (i.e. you have to be a tourist).
So if I buy from B&H should i have to pay extra vat??
Or is it included with the price $1450.
In that case how much is it.
yes its possible to buy it from Bangladesh but The Authorized Dealer Is charging way much.
They are charging about $2000 for the same product.

& there are few other stores too,They are charging about $1500, but they are not totally reliable,
they are not giving any parts warranty and have bad reputation of selling refurbished product. :/