Used is hard to come by, when I put my epic chassis for sale several years ago before I completed it I had people knocking the door down just for the clamshells, offers ranged between $3-450... Chassis isn't any good without them, ended up keeping them and assembling a very good consistent kart... If you want new, call Ward Monday morning, can't go wrong with new, in my opinion if someone is selling used there is something wrong with them because they are very expensive pieces why would you need 2 sets right?