For me, it would be like taking all the last sips out of everyone's whiskey glass after last call and combining them. Sure it's cheap, but it's random and like weezell, I'd personally prefer to buy Luxury Navy Flake, which is actually cheaper than Carter Hall. smokingpipes has 14oz of CH for $2.45/oz, while you can get 16oz of bulk LNF for $1.90/oz.
Plus, every batch is a one-off: liking what you get one time doesn't mean you'll like it next time.