Seems to be a sales outlet for Chinese fakes.
Part of the policy of these sorts of outfits is make it clear that they
are selling 'copies, counterfeits or whatever' and
not selling fakes of genuine coins by
deception, and as such, are able to sidestep the Law.
In Europe, much the same sort of situation exists for marketing non genuine ancient coins to tourists. In fact, it is illegal to sell genuine ancient coins without a license, because they are part of a nation's heritage, but it
is quite legal to sell copies of them, irrespective of how deceptive that copy may be, so long as they make it clear that there is no intention to deceive.
In both cases, the buyers of such products often play it 'dumb', and attempt to re sell them for a profit anyway.
The only recourse is to expose them, and it is part of
ebay policy to simply withdraw such products from sale, a policy that is not always reliable.
If in any way you are suspicious, post here on the CCF and also seek the opinion of a professional coin dealer.
Internationally, it is a very 'gray' area for the Law, and so is a very difficult area to police reliably and effectively.
My reaction to all of this is to learn as much as you can about fake coins and their methods of manufacture, how to test for them, and how to compare against genuine examples.
It is the method of manufacture of fakes that most reliably exposes them.