There are some things that I don't understand in life and one of them is middle men. Recruiters like real estate agents are middle men. If you are looking for a job teaching English abroad you'll probably encounter one.
They are common in Korea.
This is one trick on how to find a good job teaching English abroad. Chances are that you may run into a recruiter if you are planning on teaching ESL in Korea, China, Taiwan or Japan.
Cut out the middle man and deal directly with the school. Recruiters can add to the complexity of finding a job and they have their own interests in mind.