you can buy them online, china have so many such stores , i know one online shop http://www.nike2nike.com/Brand-Shoes-c-1��
You will need to first check with your local government agencies (state level) to see what licenses you need. I am in California and you need a business license, and you also need a State business sales tax number.A company you desire to buy wholesale from will require the State Business Sales tax number to prove you are able to sell clothing to end users and buy wholesale. The way you usually get in contact with these large companies like Nike is to contact them from their website and find out who is your local wholesale distributor for them (maybe a regional office of Nike) and depending on how they do business and how much you want to order...Sometimes they require you to give your bank information and a contact number and your bank account #. They sometimes prefer to have names and numbers/addresses of companies you have done business with so they can check that you are a good customer and you pay your bills. Also, with large companies who have a recognizeable brand name, they sometimes require pictures of your store location, etc. to approve you to sell their brand. They usually have a form for their accounting department that you fill out with all that information. Dont be discouraged by how much that all sounds like. Some companies are not that picky about it they just want to check you out. Another way to check into this if you dont require all of your items to be Nike, is to go to the garment district in the closest of Los Angeles or New York. There are alot of garment sellers there and you can just go pick things out and buy them as few as 6 to 12 items. There are some brand names there as well and some of them are available to talk to in the Market Centers. You can call and ask about where you might visit someone if you are near NY or LA. Check on websites like I said and speak to some of their sales people. They do want to sell their items so dont be intimidated. If you find you are not quite ready for all they require, then do all your state paperwork first (you learn alot from them in the state tax area about how to start your new business etc.) and then work toward your goal. Good luck!!
You ll have to contact the company s sales department and ask them to have a local representative (aka salesman ) contact you.