Sellers are required to obtain approval from Amazon before listing in certain product categories. Sellers must list products in the appropriate product categories to avoid listing errors. To request a category selling approval, see Categories and Products Requiring Approval
The Everything Else category is available to all sellers primarily for collectibles, such as stamps, and other products that do not clearly belong in other categories. Do not list a product in the Everything Else category if the product matches an existing product page, belongs in a category that requires approval, or is restricted or prohibited.