Last ditch use of a knife. I don't know about you but if I am down to a knife that means I have used all my ammo or my gun/hand is out of action for some reason. That knife is the only thing between me and a long dirt nap. I want the best I can get. You put whatever price you want on your last ditch tool to save your live. Might as well carry a Raven .25 too, hell they're cheap. Might not save your life when you need it though. But you are right, might never need it. It is up to you, just don't count on someone else saving your butt. It is up to you. Put as much or as little into it as you think it is worth.
"Every normal man must be tempted, at times, to spit on his hands, hoist the black flag and begin slitting throats." H.L. Mencken