Trombone J. Michael The thumb lever doesn't move because it hasn't been maintained for over 10 years. Used for less than a year. No maintenance kit. I will not perform any maintenance. I will hand it over as is. I don't think there are any noticeable dents, so I think it will produce sound, but I haven't tested it. There is rust in places not shown in the photos. I have the mouthpiece, but it's not clean due to clouding, so I will basically exclude it. I can only provide the model number. I will include it if you still want it. Please refrain from purchasing if you are concerned about the condition of scratches, rust, etc. No claims, returns, or refunds after purchase without questions. Please ask any questions you may have.