None of this post deals with moderator enforced limits!I'm starting to dig this idea of a community-enforced ban on new sellers. Not because it will work, or is even remotely a good idea.
I like the idea because it is an online-version of the
Prisoner's Dilemma. For the community-ban to work, everyone must agree to not buy from sellers. However, that means that the best situation is that the entire community practices it, but
you. You get the ability to buy from a seller, and get all of their cheapest items, while the rest of the community stays banded together in not buying from them.
This is why it is extremely difficult to combat carbon emissions on a global level. Reducing carbon emissions cost money, so it is best for every other country to reduce their carbon footprint, while your country doesn't. This is why no country has greatly focused on it.
http://gregmankiw.blogspot.com/2007/04/case-for-small-carbon-tax.htmlNow, this idea can't work, beyond just the failings due to the prisoner's dilemma. First off, new sellers have absolutely no reason to listen to old-timers. Likewise, new buyers also have no reason to listen. The best old-timers can do is flood a sale posting with negativity and flames.... which already happens!
Yet, this has not prevented 100% of sales for either RetroHungry or SegaSaturn. (To what influence the flame war has had on sales is questionable). So, in short, this won't work. Appeal to the mods if you want real change.