first think is that you should trade in local area.but you still want to make deal outside of india first conform that they are trusted or not.may be they are spammer and you can pay them by PayPal exchange of btc.
please be caution when you use paypal, because i came to know that using paypal lot of scam are happening. paypal is not secure nowadays. trading in local is best idea but take some precaution when dealing with them like where you are going to do the transaction and palce where you meet him. choose this wisely because their is local scamming is also very high.