The best way for you to purchase nike shoes in bulk would be by getting them directly from their official outlets so make sure you know what you are doing if you want to not only purchase genuine nike shoes but also, shoes at the best available prices.
Purchasing these shoes online would be a better option when looking to obtain them at the best prices however it is riskier too given that you never know which store to trust given that anyone can claim to offer nike shoes but all you end up getting upon placing your order would be counterfeit shoes that wrongly claim to be from nike.
If you research online and seek recommendations and reference from reliable directories, then you would be able to find something that may be of interest to you. Look for reviews and ratings about stores that distribute nike shoes so you can be sure you are getting nike shoes from reliable stores that are authorized distributors of nike shoes.
Stores like http://www.onefactorytrade.co would be ideal for you to obtain nike shoes from though you may want to carry further research out about them yourself for your own satisfaction before going ahead and transacting with them.