unfortunately it is more like a thousand
Like I said, your best bet is to write it off to life experiences.
I don't know your circumstances, but maybe you could throw up a "Watch out for this guy" post on Facebook or some other social site, or something to that effect.
Better, one post that describes how you got screwed "but you won't mention any names" type of post and another post after that one naming the person with a " zero stars rating for work done" type of scenario.
That way you're not calling the person a fraud, but any intelligent person will put 2 and 2 together.