I am always asking US sellers to send me via "Registered Mail", because, if I have bought something, it is in my interest that I get that safely in my hands. I am rarely buying cheap items, but, in the case that something has a price a couple of $, it will be silly to pay $15 for the Registered Mail. But, in that, case, I will rather decide not to buy that item at all.
But, there is another problem... "Registered Mail" is available only in the US Post Offices, not in the
ebay or USPS on-line shipping stores. So, the seller/sender must go in the Post Office to fill the form, pay in the cash or credit card... and the bigger sellers don't want to do that. They prefer to arrange the shipping on-line, and the Registered Mail is not available to be purchased on-line.
Additionlly, in some Post Office in the USA, Registered Mail for some specific countries is not available?? That is the main mystery to me. For example, I have received more than 200 Registered Mail packages from the USA in the last couple of years, but, here and there, some sellers use to told me that in their Post Offices told them that "Registered Mail" is not available for the overseas. WHY? I received a hundreds of them already...
There are 2 possible solutions: some clerks are totally dumb and uneducated about their jobs... or, smaller Post Offices in the USA really don't ship Registered Mail ovearseas... I am still not sure about that. But sure that sellers cannot make their shipping jobs on-line, and that is "pain in the neck" for the sellers who are selling a dozen or more items per day.