I absolutely love that green one, and I have never seen that color in nylon. You do see a few blue 84 and 91mm ones, but not that often. Seems it's red, followed by black that is seen the most often. I saw a blue Ecoline AT&T Climber at a local flea market, but a: the knife was heavily used and definitely worn and B: the guy wanted almost $20. To me, it was a $10 knife at best. At present, in 91mm or smaller nylon, I only have a Tourist I converted to Ecoline for use as a work knife. The scales came off a Sportsman II. I also have an Economy Bantam, but the scales are regular slick Cellidor. And being a bit of an automotive enthusiast myself, the "Mille Miglia" event knife is pretty cool.
I too quite like the green nylon, nice collection!