None of these "big stores" provide the game, they're all sold by stores you've never heard of, Big stores like Americanas, shoptime and submarino have the product delivered by up2games, amazon by storegamers and walmart by gameteczone, none of them are big stores.
You can find Zelda (sealed) for Brl 260 with free ship in the Nintendo Official store on Mercadolivre.
But like i said, if you go more deeper you can find for Brl 200-220 sealed.
Americanas and Shoptimes often sell and ship games, even if they use another stores on the process they take full responsibility for it, the offer I talked about was only shipped by them and sold from a store I never heard about, which is the one you'll have to deal with if anything go wrong asidr from the shipping, that's the difference.
Aside from the store you posted here that's official which is in the price range from the one I talked about, the others are usually around 300 as well, unless you buy from a person to person way, elimitaning a CNPJ to take the resposibility for the procress you are always under some risk. Worse with OLX, which was the one I used to get that 3DS some time ago that was indeed not as promissed to me by the seller.
The "big stores" as you said are into the 320~350 price range for Zelda while the very same "big stores" are selling GoW for 160-200. That's the price difference I was mentioning in my post to Polyglot and I stand as it to the biggest issue to safely buy Nintendo games here in Brazil, the massive difference to PS and XB games pricing.