Googles John Mueller confirmed that even if you do not have evaluations on your product landing pages, you can still utilize product structured markup/schema on your product pages and gain product rich results in the Google search results page.You either requirement reviews, aggregateRating, or deals and if you have that item on sale now, you can also use the deals type. If you have one or more of these offered, you can utilize item structured data and still be qualified to reveal product rich results on the page.John confirmed this on Twitter however it is likewise in the main docs.Here is the tweet where he confirmed it: You require either evaluation, aggregateRating, or offers.