Gee... I'm not sure that I would want to swap four yards of my older stash fabric for one yard of somebody else's older stash fabric.
I think I'd be inclined to just try harder to think of a way to use it up.
But then... if I'd just inherited a bunch of fabric that I did not love, or became unable to sew, I might turn it in for the money.
Or maybe I'd just give it all to a group that sews for charity.