Well, if it's a 200mm f/1.8 you want, Bryan says where he got his in his review:


Quote Originally Posted by Bryan Carnathan


My Canon EF 200mm f/1.8 L USM Lens was sourced from "chamcamera" in South Korea through EBay.
Lee at chamcamera proved reliable and seems to at this time have a deep source for these discontinued lenses.


You might check there. But I still think you should look into a 200 meter f/2. []