One of my relatives in China said they could hunt down the whole WAIXING catalog of games for me. That is for NES and GB/GBC. There are about 30 Chinese original GB games, and even more NES games. You'll know these as unlicenced stuff like Dragon Quest V, etc.
Each game comes boxed with cart and manual (I assume boxs are like the kind Genesis carts or PSP games come in). I don't know the details as of yet, but I'll know more soon.
If I got extras, or even purchased full sets, would anyone be intrested buying some?