I understand your anxiety about dealing with a buyer who pokes and prods you like that when you're dealing with a pricey item. But FYI, you should be aware that using a forwarding service — even one where you turn up info on Google like you say — actually makes things relatively easy for eBay sellers taking orders from overseas. The fact that scammers have been known to use them means a lot less than you seem to think.
As @myangelandmyprincess points out, your responsibility as seller largely ends once the service takes delivery. Right away, that takes away the risk of non-delivery to a foreign country. It was delivered to the address to which you were told to ship, end of story. Also, eBay assumes that the forwarding service is responsible for any damage incurred after it leaves their hands. So you're not liable in their eyes.
Forwarding services are more and more common these days because the cost of international shipping has gone up insanely in the last five years or so, so buyers who are active on eBay.com find it economical to use a service that will collect and consolidate stuff that they buy online — combine shipping from multiple sellers, as it were. Also, I'm sure that there are buyers who are just sick and tired of dealing with sellers who refuse to ship outside the U.S. Nothing more sinister to it than that.
