The term 'MARKET USED MERCHANDISE' can be summarized as the process of reselling, which is a six-letter word. Reselling involves buying used items from one person or business and then selling them to another person or business. This type of transaction is often done in order to make a profit, as the reseller can purchase the item at a lower price than what they can sell it for. Reselling is a common practice in many industries, such as retail, automotive, and electronics.