The OP, according to doing some IP checking, is in the Phillipines, or at least the IP's they're using to get to CAG. That is why they only want Paypal.
Please keep that in mind when sending money to the OP, and make sure to not send the Paypal payment as a personal payment / gift, since there's no protection on the payment.
Personally, I'd be very wary of a new user selling well below retail priced XBL codes.