when I was selling regularly I switched a few items to free shipping. And increased the price by slightly more than I was charging for shipping. I figured there wouldn't be much difference.
Sales of those items increased by about 25%!
And no more silly questions about shipping- "shipping $2 in the US international at cost" - How much to ship to California? ?!?!?
If you're running margins so tight that a couple bucks for shipping is a problem, then you're doing it wrong anyway.
Steve B