I have a Tokina AT-X 107 AF NH Fisheye 10-17mm f/3.5-4.5 Lens for Canon Digital Cameras. Literally, in like new condition.
ultra wide-Angle 10-17mm
Fisheye Lens Covers Entire APS-C Frame
Compatible With Full-Frame Sensor
Easy-to-Clean Water Repellant Coating
Super-Low Dispersion Glass Element
Compact and Lightweight
Fast Focusing
This is an excellent lens for underwater photography.
$400 cash, local (Seattle) meeting.
If you need somewhere else, we can talk, but that is my preference.