Something screams out SCAM for me, as you haven't given any specific details on the hero member. Either this, or youre an inexperienced seller. Either way, take caution, something could go wrong.
Could you provide a post and activity count, creation date, price?
May be he want to discuss everything privately,
May be he is selling his own hero account, thats why created this fresh one, doesn't means OP is inexperienced.
Think twice before accusing anyone.