At this day, is iPhone 5s still have a lot iof demand? Will it be enough of supply?

Because i want to buy a new iPhone5s this friday in Singapore's airport. Because it is a lot cheaper comparing to the ones in indonesia. So if singapore's iphone5s ran out of supply, i will never buy an iPhone5s. Please answer the question did you think that at nowadays iPhone 5s will still have many demands?

Its still in high demand but I'm not sure about what supply that country has compared to others.

  • Will Apple Retail Stores refill stock one day after launch day? If in any way an Apple Retail store runs out of stock after launch day of the new iPhone 6, is there any chance that by the next day there will be new stock already again? Or does sold out mean = sold out for a few weeks.
  • Why will my iPhone 4S only work with a power supply? Recently my iPhone will only operate when being charged. Once I take it off charge, the phone lasts for 1-2minutes (it is fully charged) and switches off. Then I try turn turn it back on, and it says it needs charging. please could someone give a reason for why this is and also how to tackle it. I will also give points for answers!
  • IPhone 5c has low demand, should Apple lower the price? By say, 50$? Or even 100$? And then slightly lower the 4S price to compensate. Because face it, who is going to buy the 5c at its current price unlocked? If it dropped, even by a bit, I'd gladly go for it! Opinions? And do you think apples likely to drop the price? I would-they've already shut down a production factory, what measure are they next going to take?
  • Supply and demand curve (economics)? Can I make a graph where D1 and S1 are the iPhone 4s and D2 and S2 are the iPhone 5 and I can compare the two on one graph like that?