Not a snowballs chance in Hades that'd I'd send items over $1000 to somewhere I couldn't get a signature for. Normally you're only covered by PayPal for Canada, US & the UK with online tracking & if necessary a signature.
Signature is required on anything over $250 US. They've changed the rules for Powersellers to allow coverage to any location with the above and proof of mailing as well. However....as I said above, not a chance in Hades I'd send that somewhere if I couldn't get online tracking and a signature plus I don't know how good PayPal would be at keeping their word for coverage.
Never heard of GOMA, try Google. Bear in mind it could be a real agency but someone using their name when they shouldn't a la eBay Second Chance Offers/spoof emails.
I would nicely explain that you'll have to look into shipping options for such a high value package that have insurance & a signature. I would also explain that with such a value they will be subject to import taxes, duty & brokerage costs which they are responsible for.
I don't know if I'd be considered a wuss or a synic but I wouldn't do it. Can you afford to lose that kind of money? Not for me thanks.
When you find doing what's right hard to do - you've got a problem.