Used.  Great fisheye lens!

Fun and compact fisheye lens for DX-format cameras

This compact and lightweight fisheye lens makes anything you shoot more interesting. With its frame-filling 180° angle of view and unique bending effects, every scene and subject will take on new dimensions through the viewfinder. Achieve great low-light results with its fast f/2.8 maximum aperture, and get as close to your subjects as 1.2-in. (3-cm) with edge to edge sharpness in every shot.