I once went for Summit's "Free Shipping" deal and I ordered a flywheel. I received an empty box with a 1" X 13" hole in the side where the teeth of the ring gear had eaten their way through the single wall box.

The flywheel arrived a week later with a label suck to it and a broken ring gear on it. The new ring gear I picked up in person.

"Free" shipping probably cost me more than the flywheel.