I do not ship overseas without recorded delivery and that is why the postage and packaging charge for this is quite a lot higher.
In general, postage and packaging has to be estimated in a way that doesn't leave me out of pocket. Not everyone agrees - sadly, eBay culture is one where people are happy to pay ticket agents £6.00 to concert ticket agents for a piece of paper to be mailed to them but they kick off if a price that to me is postage AND PACKAGING is more than the stamp. The price of the shipping is for my overheads just like concert ticket agents charge theirs - and I'm not a huge company, I'm a bloke like you. The charge also covers the time I put in doing this.
The tax paid by sellers on eBay is now 10% of the overall price including shipping and then PayPal take their cut too - so in essence, due to the cost of the postage and packaging, it is a shared load between me and the buyer - nothing more and nothing less, and that is the fairest way for me to do this. Without it, I would not be able to sell on here at all. Conclusion: please don't get upset if the price of P+P isn't the exact stamp price - it is the choice of some sellers to take the hit. I cannot do that.