I wish that we lived in a perfect world where everyone behaved responsibly and respectfully.

I wish that I could leave feedback on every transaction, immediately, and not have the other party take advantage of that.

I wish that every seller was honest about everything they sold.

I wish that every buyer was reasonable and actually read the auction details.

... but those are just wishes and they will never be our reality. It's human nature.

The reality is that there are bad sellers and bad buyers, because there are quite a few bad people out there. There is no one (or even two) pat answers to these issues and there never will be.

In any system where people try to get as much as they can for as little as possible, greed issues will always exist.

No matter what system is put in place, humans will find ways around it. Does that mean they should stop trying to make it better...? No, of course not. Just don't expect these issues to go away.