how to implement payment methods in iphone?

I have implemented product management system.I want to add one new features in which user can buy product from the iphone so user can do payment for particular products.开发者_Python百科 But i dont know how it possible.If you have any idea about that then please help me for this query.

Edit: I have seen amazon.com and eBay application in apple store.I want to implement similar amazon.com and eBay application.For particular product buying or purchase.I have no idea how to implement. If you have any reference documents then please provide me so it will be help full to me.

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You are not allowed to sell stuff via an iPhone app. The only exception is Store Kit with its in app purchases, but you aren't allowed to sell real world stuff there. Only virtual stuff that users can consume on their phone/ipod/ipad.