You do not have to receive Social Security checks to be eligible for a walker. Medical walkers help people of all ages navigate grocery aisles, church pews, and large conference rooms. An unexpected surgery, such as a leg or hip operation, can render even the most physically fit young adults into immobility. The way to shop for a walker is to go online to eBay, and search for sellers who offer used rolling and knee walkers at discounted prices. Shop for walkers built with sturdy materials and that include multiple controls to help you walk in any type of environment.