Used Yamaha Silent Brass for French Horn (Mute Only)

I am completely retiring from playing the French horn, which I have played as an amateur for many years, and am offering the accessories I used.

This is a Yamaha Silent Brass mute for the French horn. It is designed to be connected to an external amplifier and used with earphones, but for the French horn, which is an instrument that relies on indirect sound, the sound through earphones felt very unnatural.
However, the mute itself is well-made with Yamaha's technology and could be used without discomfort.
I had various practice mutes, but I think I ended up using this mute the most.

I discarded the dedicated amplifier as it was unnecessary, so only the mute is available. However, it can be used as a practice mute, so I am offering it at a low price.
Please note that there are many scratches overall and the sponge has deteriorated.

This is a used item that I have used for a long time, so I would like someone who understands this to use it. Thank you.