What is the best method of techniques for a webmaster to create a virtual store that sells only products from Amazon?

What method is inexpensive, easy to install, and more robust? RSS? SOAP? XML? XSLT? PHP? IFRAME? CGI Scripts? Associate-o-matic? AssociateShop? Associate engine? Mall column? Yahoo traders? (Note: Yahoo Merchants is too expensive for my purposes of selling only Amazon products as an affiliate.)

Amazon E-Commerce Services.

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