Just to get back to the OP's original question.
I wasn't a member of this club, as I had most of the variations of the BM's and M9's.
I don't have any left now, so now I am a member of the 'non owners club', much better for it and proud of it!
After my great uncle passed, I inherited just over five and a half thousand knives, swords and bayonets
spanning from the Boer war to the War on Terror.
Mostly military stuff from Australia, New Zealand, USA, Canada, England, Germany, France, Japan etc.
From military contact items to commercially produced items on the civilian market, he had it!
Union, Camillus, Wilkinson, Buck, Phrobis, MA, Greg Steel, Pal, Poole, SOG, Cold Steel, Gerber, Marbles, Ontario etc etc. Sheesh!
One day I just said 'enough is enough' as I did not feel fulfilled with having them.
(It was a constant job just to look after them, like painting the Sydney Harbour Bridge,
once you get to the end you go back to the other and start again.)
So I started to sell them off, the BM's were first to go as I didn't like them as a usable knife.
All the bad things about them was rolled over into the M9, again a poor knife and bayonet.
Collectable-wise though, I did make some money from them, but found greater joy in helping others acquire what they wanted.
I feel much greater fulfilment in helping, or trying to help others with what knowledge I can about what they have or would like.
I, by no means know everything, and my memory just isn't what it used to be, sometimes I'm wrong, I'm only human.
But as my great uncle used to say, "Collecting isn't about what you have, but what you can give back."
So this is what I try to do and have absolutely no regrets.