I am seeing here that you got the realisation after getting scammed and it happened because you were not well notified about forum trust system. We always suggest our community users to use trusted service for their needs and by checking someone's trust page you can get leads for further procedure. Sorry to say that you haven’t go through this process before making your payment to that scammer. No rules or features can't save you from getting scammed if you don't feel it necessary to learn how the forum works.
If i am not wrong then you learned the exact use of trust after getting scammed and took your step to save others. I hope you have already got a lesson which will keep you far from making any deal with newbies or negative trusted user.
You deal from a thread that is self-moderated where 20 posts by 12 users have been deleted.
I don’t think he know enough about self moderated thread and maybe after having bad experience he will spend some time to know more about it now.
Note: I will add this scammer's details on "
List of proven scammers" soon. "
Nawikre" if you have enough time then you can take a look on this list.