If the insurance coverage is $50 or less the insurance fee is only $1.30.

Sure, you could purchased DELIVERY CONFIRMATION with your mailing, but how will that help you replace the chip(s) the buyer didn't receive? That service only tells you that your package was received (could have been received empty, too ).

Your postage receipt will note the ZIP Code you mailed to but, that, too, would serve no purpose other than showing you mailed a package to the buyers ZIP Code...

JB