From January 2015 Ebay seller aucon1 from Austria was selling these mostly pre 1990 Austrian plates. They are rare types; CD, Gendarmarie, postal service, customs service, snowmobile and military, etc. They are not genuine plates and look very new-made. They are missing the official embossed seal, some of them are of a wrong design and he even advertises some of them as replicas.
They are all replicas.
It is very suspicious that he is trying to hide the registrations also.
Why even think of buying mint plates without checking to see if they are genuine or not?