YAMAHA YBL-822G Yamaha Bass Trombone

This is the Yamaha YBL-822G, a masterpiece bass trombone.
I purchased it used several years ago, so the manufacturing year is unknown, but it was in beautiful condition, close to new old stock.
I used it about every other week and maintained it carefully, so I believe it is still in good condition.
There are almost no visible scratches on the bell section.
There are some minor scuffs on the slide, as shown in the 13th image.

The slide moves smoothly without any catching, and the rotary valves operate quietly and smoothly.
The sound is also superb, resonating beautifully from delicate pp pianissimos to powerful ff fortissimos without feeling strained.
The unique wrap and rotary valves provide a moderate resistance, and as expected from Japanese manufacturing, it is easy to play with a stable feel.

I am selling this to fund my transition to tenor trombone.
I have recently cleaned the inside and outside of the instrument, and applied grease to the tuning slide for protection.
The only included accessory is the genuine hard case shown in the photos. The mouthpiece and case key are not included.
Thank you for your consideration.

For your reference, here is the manufacturer's description:
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YBL-822G

Suggested Retail Price: ¥770,000 (tax included)
Released: March 2010

Xeno Series Bass Trombone B♭/F & B♭/F/D. Bell is a one-piece gold brass, 241mm diameter. Outer slide is yellow brass, inner slide is nickel silver. Bore size is 14.30mm. Clear lacquer finish.

Unwavering, rich tone that forms the core of harmony, and a full low register. And unparalleled sound projection due to its unique rotary valve design. The long experience in instrument making, precise design, and the spirit of continuous evolution are embodied here.

An offset double rotary valve bass trombone supervised by Douglas Yeo. The gold brass used for the bell and main tuning slide produces a rich resonance. Meticulous attention to detail, from the lightweight rotary valve caps that improve player flexibility, to the newly designed D slide, and the material selection for the slide brace, supports the enhanced expressiveness of artists performing in a wide range of genres, from solo to orchestral.