See, the whole problem is that you seem to be taking this whole thing personally. It was never meant to be an attack on you, but you seem to have taken it that way from the outset of my introduction of the topic.
Break it down like this:
1. Are there people who gouge on the s&h charges on
ebay?
2. If the answer is "yes", then I have the right to express my displeasure with this practice.
3. Does every seller gouge on the s&h charges on
ebay?
4. If the answer is "no", then those who don't are going to be the ones that get my business.
It's not a matter of what YOU do. It's a matter of what OTHERS do, as it turns out. There was no need for you to launch a crusade on behalf of all
ebay sellers, both those who charge fairly and those who don't, and let's be honest -- you do realize that some people do gouge on these charges.
Probably a better original answer would have been, "Yes, you really have to check and see if the charges are reasonable; it's unfortunate that a few bad actors can have the effect of ruining it for those who are being fair, but maybe their charges are justifiable, all things considered."
N'est-ce pas?