Having insurance coverage on bullion shipments, let alone worldwide coverage, while being able to provide shipping service at a reasonable cost to customers is a nearly impossible challenge. Carrier level insurance doesn't even cover bullion, and if it appears to do so the likelihood of them making good on any submitted claim is slim to none.
Then why on earth are you advertising insured shipping and accepting payments for it?
I ordered once from coinabul about a year ago and although the goods arrived the shipping security precautions were, to put it mildly, reckless.
I've ordered many times from APMEX and I know what's possible and prudent. APMEX makes all shipments via registered mail (not just insured) with ID check required on delivery and a huge pink fluorescent
CARRIER MUST CHECK ID ON DELIVERY label. Coinabul just stuck the coin in an envelope, slapped an insurance sticker on it, and tossed it in the mailbox.
It got delivered to the guy next door to me. Fortunately he's honest and/or didn't look inside.
So I didn't order again, figuring this was an accident waiting to happen.