Thank you for viewing. This item came from my parents' warehouse. I have no knowledge of musical instruments, so I am selling this as a junk item with the operation unconfirmed. The piston(s)? moved smoothly. It appears relatively clean to the untrained eye, but to prevent any issues, I will list it as having some scratches and dirt. I will wrap the case in bubble wrap and stretch film before shipping. *Please note that I cannot be held responsible for any damage during shipping.