I've got a Canon EF 20mm f/2.8 and a EF 28-105mm f/3.5-4.5. Both are used, but very well cared for. Glass is perfect on both and always protected by UV filter. Never dropped, broken, repaired, or returned to Canon for any reason.
I'd like to trade both of these for a Canon EF 15mm f/2.8 fisheye in equal or better condition.
I won't ship these lenses. I will only do an in person exchange so that we may both inspect the lenses.