Gyms will sometimes sell their old equipment through in-person sales, auctions and other sales methods. Contacting local gyms is one way to determine if those gyms have equipment for sale.
Anyone who is looking for used gym equipment should be sure to check the condition of the equipment to ensure it is still safe to use. Used gym equipment usually won't have a warranty, so a buyer should make sure it is fully functional before purchasing it. The equipments that gyms use are usually commercial grade, which means they are meant to withstand constant use. Since these models usually vary some from home models, it is vital to look into the specific model being sold to ensure it has all desired functions.