I'm building a price comparison module for my website - the idea is similar to pricegrabber.com I'm seeking the right criteria for the comparison of products to assign them to the ones already existing in a database or state that this is a new product. I see that name, description and manufacturer are useful. I think that this would be different to different category. If you have any idea or tips about the criteria and the way to perform this comparison, just let me know.
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