If I may ask.... What in the world does any individual need with more than one M6?? Seriously, ... well not really.
Talk about having all the light you need. I'm just.... Wow! I'm in awe! And apparently envious, if not speechless.
Ok, here's how I see it. One light is the beater, well-used M6. That's the one that I keep the beam cover on and lanyard. Actually, I keep it in pretty darn good condition. I'd say it's probably even in "excellent" condition. The only thing that is noticeable is the fading of the words. The cover definitely looks used, but it did its job of protecting the bezel...not a scratch on it! I use this one for all purposes...bump in the night, going somewhere dark, going camping. This baby has been through earthquakes and hurricanes! (And before someone says "but there aren't any hurricanes in California"...I lived in the Caribbean for a few years.
) Soon enough, I'll be heading to the Northeast so this light will be going through snowstorms as well!
The other two lights....well, just to complete the collection! It's like people who collect baseball cards or stamps. I just happen to like to collect Surefire M6's. haha. Carpenter loves to collect A2's and he's got a ton! If you added all of his up, it would probably equal 10 M6's.
I try to minimize redundancy in my flashlight collection. That's why I recently sold off about $800 worth of Surefires. I wanted to thin out the herd and get rid of lights that are too similar. I didn't mind selling my A2 with the Blue LED because I never use the blue...but the one with the white LED, I had to think really hard about. But I figured that my Kroma is kind of the same as having 3 A2s (red, blue, white). I also wanted to get rid of incandescents and bulbs. So now all I have are LEDs and LED drop-ins...except for my 3 M6's.