I'm not sure media mail is really below cost: it gets shipped on a space-available basis on the trucks, which is why it can take longer to arrive. So it's reall

I'm not sure media mail is really below cost: it gets shipped on a space-available basis on the trucks, which is why it can take longer to arrive. So it's really only processed when there's excess capacity that would have gone unused. $3 for postage is probably going to cover marginal costs here.