One of, if not the sharpest lenses you can get for Nikon, or any Mount.
https://www.dxomark.com/sigma-85mm-f1-4-art-lens-review-new-benchmark/
In mint condition, barely used. Comes with B&W glass filter that was $150 after tax. Lens retails for $1500 new. With filter $1850 after tax.
Selling to fund other equipment. Will take some specific lenses in trade (24mm 1.4 Rokinon/samyang, 20mm 1.8g, 35mm 1.8g, 85mm 1.8g) or towards a Nikon DF or Z6...or try me.
Lens comes with never used case, original box, mentioned filter, and hood I forgot to include in picture.
Damn fine lens.
Will also consider parting with my 20mm 1.4 Sigma Art.