I've listed things for sale in groups, which as far as I can tell an algorithm tries to detect and convert into Marketplace listings.

The items are usually high-end flashlights, which I review as a hobby. They get removed more often than not, to the point that people in those groups usually obfuscate prices so that the algorithm does not detect them as sales listings. When I've appealed those, I got no response.

Facebook does not seem to be very concerned about false positives, or with Marketplace as a product in general.