Just FYI, the minimum Caucasians (including non-english speakers) get paid for teaching English in Beijing is 100/hour of teaching time (part time). The range is probably more like 150-200, since I don't think many suckers are willing to stay at the 100
level for very long (demand exceeds supply). Granted, this does include some time on the road, but typically something 5-20 minutes from whereever people live.
Remember that the people trying to hire you to teach are in most cases agents who take a big cut off your paycheck, and have a financial incentive to talk you into taking any job where they have a client. I wouldn't say that these agents have absolutely
zero value though, because they do make some investment in their connections to get jobs for you, and they also most likely talk you up and lie about your qualifications.
I think you should be making 100 per hour of your time invested, not just time actually teaching class.
Lastly, I saw your ad on the Beijinger a few months ago. You are way too honest to be working in China. Just lie and say you have a degree until these irresponsible institutions learn to verify experience and validate references (don't do this if you're
trying to get legitimate employment that sponsors a visa, because then you actually do need that degree).