You cannot protect yourself. eBay will in some way screw you on this, they chance is slim you will like the final result.
Now you have learned a valuable lesson, sell in the country where you live, if you insist on selling cameras on eBay.
I personally would never sell any electronics or cameras on eBay, but I understand many of our members are not in big cities. There are however several forum connected sales venues -- like the one on the RFF, where you stand a much better chance of a clean sale.
The advantage of the RFF is that you, not eBay, choose your buyer. You can call the potential buyer on the phone, confirm identities etc, a choose who you want to sell to. The highest bidder is not always the best bidder. You can even not sell to anyone if you don't want to, without getting bad feedback. You are in control of your sale.
Do bad things happen on the RFF, of course, but far fewer than we ever hear about on eBay.
Just for the record, of course I am an RFF mod, but I have been buying and selling cameras on a personal level since the days of Shutterbug mag ads in the '80s, and I have always insisted on knowing my buyer, and seller. It works, and is worth the small price of an RFF ad, and I don't get a penny. 🙂