Hi,
Where are you getting your product details( name, price, etc ) from? Is it an external data source or another Mendix application?
if the data is provided by an external vendor check if he can provide the Rest end points so that you can consume it from your Mendix application using Rest activity and then do your comparison.
If the data is from another Mendix application, Publish your data using publish rest service or you can use OData to expose the data and then consume it in another application.