Cheap jacks are a type of itinerant retailer. Itinerant retailers are those retailers who do not have a fixed shop of business. They move from place to place. They set up a shop where they are provided with a place by the fixed-shop retailers in return for some money. They do not provide goods on credit as they do not have a fixed shop of business. They are temporary and provide low-quality products at low prices and cater to the low-income group of people as they can easily avail such goods.