usually i go through user's profile before deal, but this was small amount so i neglected it. He has self-moderated topic and deleted user's comments.
He must be a poor nigerian prince for scamming mere 15$.
Obviously, now is too late to give advice, but it is always a good idea to check the trust rating of a user before doing any business with them. No matter what the amount is. There are some forum members who are not even worth your time.
Colires is already known for being a scammer and there has already been a similar case with him, as shown in this thread:
User @colires scammer