Having sold my 500 c/m, I now turn to one of my favorite Hassy lenses: the 4/50 CF T* by Carl Zeiss.
Lens glass is pristine; no fungus, haze, or marks. There may be the errant piece of dust inside, but nothing that effects IQ. Lens operates perfectly from my personal experience.
Comes with original box, rear cap and uv filter (bay60).
Asking $725 based on recent sales on the big auction site. I'll pay shipping CONUS, buyer covers any payment fees.