I uploaded 2 old photos of my HISS collection in the Collections area.

12 vintage (one is gunless)
2 (plus one mint) HISS 3
3 Septic Tanks

Plus recent (not shown)
3 Crimson Sabotage Hisses
1 Target Hiss
1 25th black Hiss

And 2 complete HISS 2's, 1 incomplete, 2 HISS IV's, and 5 or so DTC HISS's.