Han, as your neighbor who lives nearby me (in the SF Bay area) it's a surprise to hear from you from the other side of the globe. I suspect that you've gone back to your Country to visit family & friends and help them get thru the Tsunami tragedy. I hope your family & friends are all ok. Great to hear that you found the PSR3000 at a terrific price.
I hope you remember though that you'll need a voltage converter when playing it in the States, and that the PSR3000 wouldn't be covered under warranty in the US. Wishing you a safe trip back to California.
Scott