1. 'Add To Cart' - Shipping:
To offer free shipping, you will need to include the first line of code below in that item's 'Add to Cart' button code. The second line of code is needed if you want to over-ride your profile shipping with an amount you specify, and then 'shipping2' will be calculated when a buyer purchases more than one of that item.2. Change your PayPal Profile:
<input type="hidden" name="shipping" value="0.00">
<input type="hidden" name="shipping2" value="0.00">
You will need to check the box in your Profile to "allow transaction-based shipping values to override the profile shipping settings" for your override to work.3. Clear your cache in your browser.
After you've completed steps one and two, it might still look like shipping is being charged. Clear the cache in your browser and your changes will take effect.
I hope these tips save your hours of frustration.