Closed Declaration b5 or b6

I've never owned a declaration brush somehow and I know they're all great but am specifically looking for a b5 or b6. I'm a sucker for gel, what can I say. Will buy outright or have some other brushes I might possibly trade. Also considering getting rid of my brass charcoal goods stuff if that's more your speed and would rather trade than sell.

Just want to add that since the b5 was sort of inconsistent I'm looking for one that gels as much as possible.