The middle one is cheap. $4 on eBay. If I lose it or break it, no biggie.
The green one was bought as much for the fire starter as the knife.
I am planning on adding a sturdy, lightweight axe/hatchet to the set soon, and my blades will be complete. Add these to my shotgun, my .22 revolver, and my .40 S&W, and I feel pretty set. I might consider adding some sort of tactical rifle later...maybe swap the .22 revolver for a 10/22.