Here you can check the price on all Brazilian exchanges:
http://bitvalor.comRight now available for sale at: R$ 1,240.00
Exchange rate now: = R$ 3.86
So, available for sale right now at USD 321.24
Bitstamp right now = USD 324.3
Bitfinex = USD 329.6
So... it's even cheaper.
So maybe the exchange is cheaper, but if you want to take bitcoin out of the exchange, you have to pay tax? Can anybody confirm that?