For Trade Trade: sigma 24-70 2.8 (nikon) for your Nikon 50mm 1.2 ais or 85mm 1.4 ais

Hi- looking to trade a mint sigma 24-70 2.8 for a nikon 50 mm 1.2 ais or 85 mm 1.4 ais. Comes with box, soft case, hood, and 82mm filter. Lens is great and works like a champ. Just looking for a nice prime for my F3. Lens retails for about $800.
I know a lot of folks out there aren't hot on the 3rd party lenses, but this is a great example of the lens, and is a great way to get a great focal length zoom for a lens you might just have lying around in a bag.
Thanks!

PS- would also trade for your Non- 80MM Mamiya 7 lens.

FWIW- the Mamiya 7 is the greatest film camera i've ever used- simply amazing...

Bump. Again, looking to trade for:
Nikon 85mm 1.4 AIS
Nikon 50mm 1.2 AIS
Mamiya 7 lens (Not 80mm)

thanks!