Is there a difference between the search script for your site and a price comparison script? I think there is but not sure what exactly the purpose of a price comparison script is? I would imagine it is the ability to have your search results appear like you want them to look but I could be wrong. Is it even necessary to have a price comparison script on a price comparison website?

I'm a real newbie and still building the format of my site. Wondering if there are any good/great FREE scripts for putting a search field in your site and also a FREE price comparison script and if someone can explain what a price comparison script does? Isn't there a way to set up the search results to show up in order of lowest to highest or highest to lowest pricing?

Thanks for your help.