I,d ask for a full refund(broken part),once you get the refund send it back and move on.Stuff like this happens all the time with first time sellers.(packageing)A full discription at the time of purchase is imperative.Did the seller know it was cracked?Maybe not?Maybe this happened during shipping?Who knows?What,s the seller saying about the cracked part?As I said,I would ask for a full refund and ship his broken peice back.Chalk it up as a lesson learned buying on the net.JMO