I would not pay anything for a metal card until it comes with airport lounge access, flat rate rooms at hotel chains, restaurant discounts and corporate air fare discounts. Given these benifits, an One Time Fee of ₹3k sounds fair with ₹1k annual fee (refundable on spends)
I do not want to flaunt a metal card at D-Mart paying for my ₹100 daily grocery. People get OneCard for effectively free for the same.