Takumar 67 600/4 lens
On the astronomy site Astromart there is a guy selling an original Takumar 6x7 600/4 telephoto for less than $1K. He is not including the 6x7 to K adapter (I assume its because he has other 6x7 lenses he is using for astro-imaging).
Just in case someone wants to buy this monster. Includes the original factory hard case.