I have some M42 screw mount prime lenses for sale:
-200mm f/4 Asahi Super-Takumar M42 (with case) ($65)
-135mm f/3.5 Carl Zeiss Jena DDR ($75)
-29mm f/2.8 Pentacon ($35)
And a M42 Screw mount to T adapter ring for $25
Can sell together as package (3 lenses and adapter) for $190 posted (to Australia).
All lenses are in good condition, no scratches, just a little dust. Apertures and focus barrel operate smoothly.
I used them for wide-field narrowband imaging and H-Alpha surveys - the 135 and 200mm gave good results at fully-open aperture. The 29mm worked better a little stopped down.
For individual items, AusPost satchels are $8.50 on the 135mm/29mm, or $13.80 on the 200mm Super-Takumar.
Some of my images (on left hand side) for:
200mm Takumar
135mm CZJ
29mm Pentacon