How much does it cost to get a 15" MacBook Pro in Brazil? Let's analyze two methods:
(a) buy at the local store
(b) fly to the U.S., take a cab to a Best Buy, buy Mac, take a cab back, fly back to Brazil.
Method (a): 5,000 USD (9,000 BRL). See picture.
1,500 USD for the two-way ticket to the U.S. and back
2,000 USD for the MacBook Pro 15" (BestBuy)
800 USD import tax (presuming you don't want to smuggle it in your luggage, which, of course, nobody would ever think of doing)
50 USD in cab rides
= 4,350 USD
Method (b) saves you 650 USD. You can get youself a nice tablet with the difference! :-)