This is a Yamaha euphonium YEP-201. It's a type of instrument often used in school brass bands and the like. There are many signs of wear, including rust, small scratches, and dents. There was no sticking. It hadn't been used for at least 50 years. Please consider it as a junk item or a vintage item. It will be shipped in a dedicated instrument case. I am not an expert on musical instruments, so I don't know the details, but I will answer questions as best I can.