I see no reason to suspect any of those coins. Steve has been involved in ancients for a while now and is pretty knowledgeable.
plus as a Vcoins dealer he abides by the code of ethics
https://www.vcoins.com/en/CodeOfEthics.aspx"I will vouch for the authenticity of items I sell and will have no time limit on the return of items discovered to be non-authentic. I will offer a full cash refund upon return of any such item, including the cost of return shipping."
Vcoins is perhaps the safest place online to buy coins...of course since I have a store there, I have a bias.
you also have the page set to French (in your link), you can change the language setting in the top right...unless you are more comfortable with French.