Mostly joking, so someone else will need to try it out. :) My guess is that if it worked well enough for people to start abusing it, they'd close the loophole.

Mostly joking, so someone else will need to try it out. :) My guess is that if it worked well enough for people to start abusing it, they'd close the loophole. As another poster points out, you still need to pay their transaction fee, so the shipping savings has to more than offset that in order for the trick to even be worthwhile.