is there a plugin for automated affiliate product feeds?

Hi I am having trouble finding a plugin or theme which will enable me to build a website featuring special offers from affiliate networks. I want the offers to update automatically and I know the networks can provide product feeds. So I just need a plugin which will display those products in a shop style site. Does such a thing exist? I did spot the Datafeedr plugin but they charge $30 per month for the feed and right now we want to try out the idea first without that commitment. We dont mind paying for the theme or plugin but $30 per month seems a lot at this early stage when we dont know if our idea will work.