User Submitted Products Theme (directory/listings?)

Hello, I am looking for help tracking down a theme and/or plugins for a project. I want businesses to be able to register as a user on a wordpress site, and submit their products into a categorised directory.

All directory/listing themes I have seen are for the actual business locations, and not their products.

Has anyone seen a theme or plugin that would allow for businesses to submit products which would ideally have some sort of monitization (subscription) system integrated? Thanks so much for taking a look!