You broke it by twisting it the Rong way (fuck knows how you managed that, they’re pretty strong…).
You’d be surprised what sells on the shaving forums. If it’s something of decent quality like a Simpson or whatever, someone will probably give you a few quid for it.
Most badger hair comes from China these days, where it’s farmed for food. But conditions are pretty bad, even by their standards, and synthetic knots are getting really good, so I am happy not to contribute to the cruelty.