Correct me if I'm wrong but I believe most of the shoe's on websites like Alibaba.com are fakes mostly from China. I have been looking to open an online shoe store as well but some much scam and counterfeiting I am having a really hard time.
This is a pretty hard venture to get into, especially if you want nike! I read that it took Tony Hsieh, the owner of Zappos quite a number of years to land that account.