Ben, it doesn't suck. In fact, virtually EVERY single student or diver who has played with primary donate with us has concluded it makes better sense than the "donate the octo" approach. And when it comes to using cheap octos, remember that, in your setup, the person to whom you are giving the second-rate piece of equipment is the person who's just had a life-threatening event occur, and is probably pretty freaked out. If having a reg that breathes hard adds to their anxiety, you're looking to push things closer to panic.