I run a successful Anglophile blog called Anglotopia and I'd like to open a bookstore on the site selling book related to England and Great Britain. I'd like to just use Amazon.com Affiliate stuff, my question is do they have a way I can have my own branded cart so that buyers don't leave my site? How much does something like that cost? What kind of traffic would I need for something like this to be worth it? Is there a way I can hack together a cart/ordering system using Amazon using open source tools without having to pay upfront?