ill grab some pics later, but its a drivers side (us passenger side) bottom mount seat rail. very nice construction, it will fit any skyline, or s13/14 as well.
just one bolt hole doesnt line up on schassis, but can easily be made to fit.

100$ seems fair.

 

How much do you pay to have your seat rails made? If its not too much Ill buy this, s14 seats suck.