@sunnk, you cannot automatically assume the OP is from USA.
@OP: Which country are you from? If you tell us, we can recommend a card that fits your budget (tell that too!) and you can surely get it in your country.
that 6850 is around 175 USD.. do you have another GPU? lower than 6850 but faster than my choices?
the op said this thats why i assume that op is from us