they're really nice. also they appear to be heavy, bulking, and not for me... seems almost like the sheath ways MORE than the knife. that might not be true, but ... wow.
the nicer the sheath... the more expensive. materials, numbers made (economy of scale), and pretty much 100% handmade.
how much would a BK2 cost if it was hand made, in smaller number? a lot.
bottom line though, i can buy a lot of Beckers and booze for the extra money. nothing wrong with the factory sheath for me.
what's really sad? some expensive knives... don't COME with sheaths. at all. you get a nice piece of oiled cardboard stock

hee.