I think that ICANN determine which domain will be premium and how much is the value of each.
I see many domains with pretty silly names and are priced for thousands of dollars and at the same time good names that are available at the standard price. Who exactly determines if a domain is premium or ordinary?
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I see a lot of domain sellers that falsely declare their domains as premium in order to extract a higher price.
From my perspective, a domain is a premium domain if a buyer is willing to pay a high price for it. It is worth whatever someone is willing to pay for it and not what anyone says it is worth.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin
So called 'premium' domains are already owned, either by an individual, company or registrar for example. That also implies that you cannot find (buy) it somewhere else although the domain may be marketed at different platforms across the net.
When talking about unregistered names, these can be registered anywhere. There will be some price differences between different registrars. However, you will usually (if not never) not find 'premium' unregistered names there.
That's true with everything. 100% agreed.It is worth whatever someone is willing to pay for it and not what anyone says it is worth.
In my point : Its all about the quality traffic pulling keyword rich domain is premium domains.