Rhonan,
I can fill you in on the fake iPhones a little ... there is a "3GS" that has Wifi, 3G, dual SIM, dual cam. In Shenzhen it was offered to me at 850 RMB and I tested the wifi which worked no problems. I was also told that battery life is better than the original and that any iPhone apps will work on it (cloned iPhone OS on there). Since you'll be local, get the seller to commit to a warranty as some models (not sure about this one, the seller said the one with TV antenna had quality issues, not this one, but then he's the seller right?) seem to have problems.
I'll get one when I move to China or maybe a 4GS by that time lol
Frank