What's poppin China Moto?

I am totally buying a dirt cheap 125. I am not really concerned about quality but the best bang for the buck is always appreciated!

I have never been on dirt. I am taking a dirt track class with KTM but I need to bring my own little 125. (only 125's allowed) I don't have one, never rode dirt before, never researched dirt before. This bike is pretty much only for the class and maybe practicing in the field near my home once in a while. I am not looking to spend much on this thing. What Chinese brand with your expertise would you purchase? Oh and I might... might teach my brother the basics of riding on this thing.

So whats the word?