I've got a flex nib Conklin pen that I've barely used. There is however a small amount of corrosion on the collar of the pen that I tried to capture in one of the pictures, but it's really hard to capture. It's barely noticeable and doesn't affect the writing at all. I'm located in Toronto, so the price is $50USD + whatever the shipping costs are.

https://imgur.com/a/FvMrEvi