New comers should punch "gold member" into the "Search Forums" panel at top of this page to get a little insight into the horrific extent of the scams. 

Concerning certification, you need FCC/UL or CE or A-Tick/C-Tick certificates for legal resale of most types of electronic products is USA, EU and Australia respectively. Of the tens of thousands of Chinese electronic products listed on Alibaba, you could count on one hand those products which are properly certified. In other words, DO NOT IMPORT ELECTRONIC PRODUCTS FROM CHINA.