My UK ebay postage to the USA (almost)always includes £4+ of tracking/insurance (often considerably more for anything £100+ish). This means that even a medium sized lot can easily be £7+ to the US. I recently shipped a FW 40k manticore turret to someone in the US with £8 postage, it is insane, but it is ebay's fault.
It is entirely due to ebay/paypal siding with anyone who claims items have not arrived (but then i something i won ever failed to arrive and i was not shown an addressed receipt i would try to claim the money back as well). I sold some stuff on ebay recently, the basic price international postage i calculated was horrendous, i almost just disabled international bids due to it, but then reasoned that if someone in the states was prepared to pay the postage i would ship it, if not they could just decided not to bid. I have never purchased anything on ebay from overseas...the domestic postage is usaully enough of a rip-off as it is
In the UK royal mail will not put the address on the receipt (printed) unless it is air sure/signed for.
the other thing annoying me is not being able to give the person who never paid for an item negative feedback...Dispute resolved in my favour, item relisted and sold to a non-moron and ebay will still only let me give positive feedback...