It was in Magazile Luiza, Casas Bahia, Submarino, Ponto Frio, Americanas, Shoptime, Fastshop, Extra, Carrefour, Walmart, etc etc etc.
Where most sales comes... all of them got out of stock at launch too.
You had 10% off if you paid without parcels.
BTW at launch 4K reais was around 1.8k dollars.