I bought this Nikon AiS 50mm f1.2 new, and have only used it half a dozen times. I have always kept it in its pouch.
serial number: 340030
Focus ring is buttery smooth - an amazing feel that's unique to this lens.
The aperture ring offers just the right amount of resistance, with distinct clicks. No stickiness.
The lens is mechanically and optically in 10/10 condition. No signs of use. The glass is 100% clean. It's a true pleasure to hold and use it - this lens is mechanical perfection!
Price: $545, including shipping within the US.
Happy to answer questions.
Best,
CP