Having been burned once (and only once) when a buyer made a claim of non delivery, I now refuse to ship without an Ebay approved delivery confirmation. If I cant prove it made it to your mailbox, I wont ship. Plain and simple. And THAT can add up to a considerable amount of money depending on where its going. Not all methods of shipping can BE insured, don't forget that. Priority International FLAT RATE being one of them. Which is why I don't normally bother to offer international shipping on razors I don't think will sell for more than 40 bucks Simply not worth it.
I think ALL shipping services have a certain scam factor to them (so do some buyers and sellers!) Like many of you, I simply subtract the shipping from my top bid price, and I expect when I do an auction, others will so likewise.