Why is the price and availability of the product not displayed in the Google rich snippet?

Question

Search Engine Optimization

Microdata was used (Schema.org).
The Google tester shows in the preview both the price and the availability of the product. https://search.google.com/test/rich-results .
There is nothing in the actual search results. Where to dig?

Answer 1

Microdata was used (Schema.org).

When was it used?
The pages may not have been reindexed yet.