Going rate for a native-speaking English tutor in Seoul's high-rent districts, according to a mom who just found one, a Dartmouth graduate no less...
50,000 KRW ($45)per hour for one student
60,000 KRW ($54) for blonde female "premium"
500,000 KRW ($446) The cost for the referral agency who found the English tutor
You can specify nationality, gender, hair color, prestige of degree, as well as how much you are willing to pay, in your request.