I'm sure it'd be less than $15 dollars a piece. Hire someone to unpack them at $8/hr, someone to paint them at $8/hr, and someone to bag them at $8/hr, and I'd bet you could go through 30+ an hour, which would come out to $0.80/pop for labor. Plus transport and paint. Sure, it costs them, but keep in mind they don't have to make profit, they just have to make back more than the cost of a total loss for it to be worth it. Selling every single one for a few dollars loss should be better than losing them all for a more $$$ loss...