Some sellers are also price gouging on in-demand items like hand sanitizer, masks and cleaning wipes.
Amazon said all third-party sellers must follow its fair pricing policy, which states that companies can't sell a product for a significantly higher price than seen in other places.
For example, Amazon removed one seller for marking up face masks to five times their usual price.
Third-party sellers on Amazon have been criticized in the past for selling defective or fraudulent products with little oversight.