There is also a big difference in quality. All 42" TV's aren't created equal. it's like saying i can buy a car with 4 seats in SA for 10000 Rand and i come to hong kong and there's a 4 seat rolls royce for 1000000 HKD. Go figure. i'd say about 80% of TV's in any size are cheap junk but the suckers want as big as possible without any thought to component compatability or clarity, design, assembly etc.
Chances are what's in SA that you're comparing it to is junk and what's in fortress is good or above average.
Will the power be on long enough in SA for you to watch it?