Woha, eBay India has sent message to all its registered members selling stuff on site saying that eBay is not responsible for selling anything that it is prohibited by law. The responsibility lies with the seller and the eBay user agreement specifically mentions so. Sale of legal tender coins, stamps and banknotes is prohibited and the seller shall ensure that there's no violation of the laws. Those doing so may face actions like suspension of account, criminal/civil legal action.
In short, seller shall take care of himself, eBay is not going to help him!