Make it so the product name/title, product number, and brand are immutable. Make it so you can upload new photos, but you can't remove old ones. Flag changes to the description that change more than 50% of the text for human review.

It would require the seller to be a little more careful with the initial submission, but hopefully if they do make a mistake, they notice before there are too many reviews anyway.

And maybe have a way to request a change to fix mistakes that requires manual review. And I think charging a fee for that review would be fair.