Products in Google Merchant Center get disapproved time and time again for all kinds of reasons.
A common issue is a disapproval because of ‘Mismatched value (page crawl): (price [price])’
Even when you have the price info perfectly visualised on your landing page, Google may still sometimes not see your price or see the same price you have in your feed.
A possible cause that gets overlooked easily: Outdated microdata or HTML.
FIX: Check for contradictory information within your site build, and remove it to eliminate crawling issues using this tool –>
https://search.google.com/test/rich-results
– Nils