Read this: Simple way of earn money..

try to sell in ebay, you can also earn from there,

haha, its a nice way to earn money !the electronics that made in china is all much cheaper than buying it from US.. you can try "ebay" and "alibaba.com", i sure that you can find some useful imformations from it .. whats more, i have to remind you that you maybe couldnt do it successfully ,because of two reasons: the one, you are living in Brazil, if you sell chinese electronics in there, the serving after sale may be a difficult problem to deal with ,after all nobody want to buy something that couldnt be reparing timely! for another one,i have found your age from your profile that is just 17 years old,so that you are too young to gain Chinese trademans'trust in you .. However, on my opinion , i encourage you to have a try !and you could ask me if you have any question about China