The flasglights I own also takes cr123a batteries(photo batteries) but why waste 10 bucks for two all the time when I can use the 18650 rechargeable to take full advantage of the lights power. Its expensive but when you use it a lot its worth the money in the long run.
@saki, no, I don't collect swords. Its too big and I don't see no use for it. I only buy things I can use.
@gnam, I don't believe most buck knives are collectable unless you are looking at the ones that are are no longer made. If you want some thing that you can collect and worth something down the stretch maybe look into custom hand mades such as chris reeves, fiddlebacks, and others out there but they will cost around the 300 range.