I am thinking of getting an Xbox in Australia. The price of a "new" Xbox is around AUD 249 w/o any games. Then I saw got used/second hand Xbox selling for about AUD 149 , AUD 100 cheaper (RM 300 cheaper!). XBox games retail for AUD 99 (cost more than PC games) for new and about half price for 2nd hand, if got. I'm planning to buy one maybe in June (my b'day in June and that time after exams ) . Since I am keen to buy one, I wanna ask some questions:

1)If I were to buy a second hand one, what I should check and ask?
2)Can play Xbox live in M'sia?
3)If I ever want to mod it when I return to M'sia, can it be done and how much? , if so, will it make my Xbox cannot connect to Xbox live?
4)How much ori Xbox games cost in M,sia?
5)Got any different in Xboxes produced in different years? like if 1 is produced in 2002 and another in 2005?

I was hoping to get PSP as well, but then dunno when it will arrive in aus. Then again it will cost around AUD 499 . So better get PSP in M'sia when I get back.