Does anyone really know anyone on ebay? Really, it all comes down to trusting a complete stranger. And sure, there are a few bad eggs in every basket. I know I'm not one, most of the time. I don't do it on purpose, but everyone has their moments. But it's those who value professionalism over preferred routes who tend to succeed at gaining everyone's trust. So what happens when you get mixed in with one of the few bad eggs in the lot? I don't really know. I'm not labeling anyone in particular, it's just something I've wondered about my entire time here on ebay. But what I've found to be helpful while I've been here is the following:
Be courtious of your fellow ebayers and patient. Not everyone understands what you meant by the text on the page.
Be simple and honest. State everything for what it really is. Hopefully you're not trying to sell a piece of garbage.
Do your research on people. If you're uncomfortable about dealing with users with negative feedbacks, then don't. BUT, read what others have said and look at those user's feedback scores too. Perhaps their remarks aren't that precedented.
Do your research on items you're buying. Make sure you read descriptions and payment methods THOROUGHLY. If you are still unclear about the item, message the seller BEFORE you bid.
Do your research on items you're selling. A reasonable amount of knowledge will help you to be more thorough on your item's description and help your prospective buyers know exactly what you're selling. You wouldn't want to buy fruit without checking to see if it's bad, would you? Maybe it doesn't look like it on the outside, but usually a good squeeze will help let you know about the inside without damaging it.
I don't pretend to be the biggest ebay expert. Heck, I don't even have the blue star. I'm not at the age of higher wisdom; I'm only 19. I just want to be as honest and knowledgeable as possible and for everyone to do the same back. Maybe that's old school ethics to most, but it's not that farfetched.