The following Insurance Fees are from the USPS:

Insurance Coverage DesiredFee in Addition to Postage
$0.01 to $50.00$1.75
$50.01 to $100.00$2.25
$100.01 to $200.00$2.75
$200.01 to 5,000.00$4.70 plus $1.00 for each $100 or fraction thereof over $300

Insurance for $0.00 = $1.75

Note: We recommend insurance for your safety. We cannot guarantee items that are not insured.