Thiaguinho-sama
If you think of an import, one of Japan's cheaper. To use the Yen to R$ always use ¥ bases in 1000, to be "effective" in conversion.
If you take into account that ¥ 1000 = R $ 34.80 (the national minimum salary is R $ 780), and the largest pre-order figures are between ¥ 8,000 ~ ¥ 13,000, this still is above average needed to keep the home needs for a month for only A person. If you think like me imports are "luxury items" of brasilera middle class.
Good otherwise the Brazilian Alfandega uses to convert US$ to R$ the same way as international shopping sites that offer in US $ are required to use (due to Br Law).
Not to mention the tax rate for imported products: everything above US$ 50 are increased by 30% to 60% interest rate, depending on the product type.
If you think a Vol of a Manga series is ~ ¥ 2,000 (R$ 69.60) still seem attractive.
"Amazon like sites" seen to be more cheaper for Eng Tranlated Mangas, but there much involved tax.
At level of curiosity a Pt-Br Translation Manga is around R $ 20.00, but often not very well seen in the actual Brazilian Otaku culture.
Import by Canada I had never thought about, I will try the next time.
(sorry any Eng Erros)