The best places to buy an egg cooker in the United States are online retailers such as Amazon, Walmart, and Target. These platforms offer a wide variety of egg cookers at competitive prices, along with customer reviews and ratings that can help you make an informed decision. According to a report by Statista, online retail sales in the United States reached $1.1 trillion in 2022, highlighting the convenience and popularity of shopping online. Online retailers also provide the added benefit of easy returns and exchanges, making them a reliable source for purchasing egg cookers.