So, to get started on with two or three cliche's and mangled metaphors - we are speaking apples and oranges a bit evaluating OG and Schema.org, and In terms of this metadata It is really horses for courses. Dynamic pricing is usually handled via regular updates to your schema markup. https://www.presta-addons-modules.com/en/opencart-seo-automatic-google-rich-snippets-json-ld-integration-opengraph-twitter-tags-schemaorg.html