Shipping insurance only covers the vaule of the item, not shipping itself. So if your item is $49.99, you would charge the shipping cost for that amount only, no shipping included. Shipping is for shipping only, and cannot be insured.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .