Prices varies from country to country. It is influenced by the strength of your currency, import taxes and bulk shipping cost from the originating country to the destination country.
A HD 5670 in the US sells for around $85 online. However, companies importing the HD 5670 to India will have to pay import tax plus the freight cost to transport the HD 5670 from the nearest "global warehouse". For the importing company to make a profit, it might sell the HD 5670 for the equivalent of $115 USD in Indian Rupees.