Dear Rich: Do I need authorization from the manufactures (such as Apple, Samsung, Sony etc.) to buy and sell their used/refurbished products on-line and in-store in the USA? You can re-sell other manufacturer's products as long as you don't mislead consumers into believing that you are an authorized dealer or agent of the manufacturer. You also shouldn't mess with the manufacturer's logo, lift advertising copy or images from the manufacturer's site, or replace the manufacturer's authorized parts with third-party parts. (As happened with Rolex watches.) Your right to resell is based on the first-sale doctrine (or trademark exhaustion).