Here is a very nice looking late version Olympus Zuiko 50mm f1.4 MC
Unfortunately, it has some haze between an internal element. The haze is only visible when you hold it up to a bright light.
I tried to show the haze in a photo, but could not. But it is there.
Surprisingly, it doesnt seem to have any effect on the images it takes. But I am selling at a discounted price anyway.
I think $30 plus shipping is fair.