ebay is not ever going to change. And even if you manage to close down some of the sellers, they come right back. For example,
ebay Safety and Trust has removed the British Cartel seller multiple times including Feb 2011 and again in Jan 2014. And even if
ebay actually removed some sellers permanently, there is a never ending supply of people who are willing to take their place and take advantage of others.
The only real solution is to better educate buyers; this is why I started Stamp Smarter about 4 years ago. There is a database with 2000+ reviews of listings and folks can add more. Statistics are compiled for all the listings. So you can quickly lookup a stamp or seller and glean a better understanding of what to be watchful for.
Our hobby has far too many folks who think that all the need to do is become knowledgeable about the stamps they buy. Others have blindly bought into the
ebay marketing brainwashing that they are perfectly safe buying stamps sight unseen (other than an image) from an anonymous seller living in another country. Some folks read online about the 'great find' that someone makes and this only encourages them treasure hunt and buy endless amount of poor quality material.
Truthfully, the most successful buyers are those who invest the time and effort into understanding not simply what they are buying but who they are buying from. I think Dan (revenuecollector) is a great example of a person who does exactly this. He has often posted on this forum about the things he does to invest in buying properly. How he builds relationships with sellers, how he has learned how to search and filter for information on listings.
So I think that buyer education is the only real solution here. Chasing it from the opposite direction (trying to 'fix' the
ebay issue) is useless. There are good sellers online, smart hobbyists are investing in doing proper discovery on who they are buying from and building strong relationship with those dealers.
Don