Include Product Price in Rich Snippet?
-
Should price be included in rich snippets?
Is there any research supporting inclusion or exclusion of prices in snippets?
-
Yes, it displays pricing information in your listings as seen here.
If you are asking if it's worth doing it, ROI wise, then yes. It makes your listing stand out more. There is the argument that competitors might have a lower price listed in the meta data, but organic listings aren't really used for price comparison. That's what apps / Google Shopping is for. You'd be surprised at how few online stores are even showing this meta data, anyway.
In addition, Google isn't the only service using the meta data. You will also get included in shopping apps that crawl this data.
As far as hard numbers, I don't have that or know of blogs that have published similar data. Including meta information overall has increased CTR in my experience, though.