The US unlocked prices for iPhone 5 was revealed hours after its official launch on September 12, 2012. AppleInsider quoted Apple iPhone comparison page prices of unlocked 16GB, 32GB and 64GB iPhone 5 models at $649, $749 and $849, respectively.
U.S. unlocked prices shown with asterisk *
iPhone 5 Malaysia prices
It has not been announced yet but from past experience and by extrapolating, prices for Malaysia market is likely to be as follows (at current exchange rate):
16GB : RM2,299.00
32GB : RM2,599.00
64GB : RM2,899.00
Given that Malaysia prices are RM100 lower than the extrapolated US versus Singapore prices, I am putting my money on Malaysia prices starting at RM2,199 (16GB).
Let's see in 3 to 4 weeks' time.
Other things to consider: nano-SIM
The new nano-SIM is a shrink-equivalent of the micro-SIM and measures 12.3mm x 8.8mm with thickness of just 0.67mm, or about 15% thinner than micro-SIM. You cannot cut your existing micro-SIM into nano-SIM, the same way you did it previously by cutting normal SIM to micro-SIM.
There is still no confirmation on nano-SIM availability in Malaysia, so even if you get an iPhone 5 in the next week or two, you won't be able to use it as your primary device.So, you may want to reconsider your intention of asking your friends or relatives in Singapore to buy one for you.