I am selling my last 90/1.0. It has a Nikon mount. It doesn't have a thread for focussing so it is fixed focal distance (around 40cm's). It is a really fun lens, has all sorts of abberations and isn't really sharp anywhere but will allow you to create extremely creative and fun images.
I have included an image of the lens together with the Nikkor AF85/1.4 so you can see the sheer hugeness of this thing. The glass is in very good condition, no scratches on front or back element (though I doubt whether these would have mattered Smiley).