How to deal with eBay and spiteful buyers?

[weirdami]

So you became ineligible for the higher discount because your rating for shipping went down by 0.1? That's 2%. Were you on the edge of the 15% zone or something already?

[weirdami]

If the vendor cannot be arsed to calculate a realistic P&P charge, and cannot explain the difference satisfactorily when asked, then it's tough if they get low P&P feedback ratings.

If I see that shipping is way too high, I don't bid on it. I also don't bid if there's no shipping cost listed. If you know what you're going to be charged up front, you have no reason to complain when you are actually charged that much.