They are in new condition and have been used only a handful of times and always kept in their covers when not being used, I simply don't use them enough to keep them.
1 x NISI 150mm Holder system for Sigma Art 20mm f1.4 lens - $175
1 x NISI HD Polariser 150 x 150mm - $320
1 x NISI Reverse Nano IR GND8 150 x 170mm - $310
1 x NISI Nano IR ND 64 150 x 150mm - $285