My fishing expedition almost ended with a disaster, there was a Samyang 8mm fisheye on eBay on BIN for almost $100 under the common price. It turned out to be too good to be true and a scam, when I got my money back I bought one from a reputable seller instead. I haven't had much time to try it out for real yet, but it's great fun and a bit of a challenge to use without getting my feet in the image.