What's stopping the price from being extremely low? Plenty might pay $1 to take a bundle of 1000 items of clothing, pick through it and find 20 items they like, then destroy the 980 other items.
Except being destroyed locally in a controlled or regulated process and shipped to be destroyed overseas with more relaxed regulations are not equal footprint wise
980 items being shipped then destroyed versus 1000 items being destroyed.
It's 980(x+y) instead of 1000(x)
I have no knowledge of the tradeoffs, but I might also imagine that the method of destruction could be worse: incineration vs landfill vs thrown in the ocean, etc