Stories like this show that such a thing would need very tight regulation.
Like what? Kids need a parent's permission to donate their kidney? I don't think you'll get much argument about that.
Also, keep in mind that someone's life was saved here. Someone about whom we can't make very many assumptions based on what we know.
That's the catch with the whole organ selling debate: however horrifying you find the seller's story, you have to compare it with the buyer's, or rather the would-be buyers who die on the waiting list.