In May and June 2016 asistdr (aka biz4me) from Pacific Grove, Monterey in California was selling these reproduction Yemen and Aden plates.
They are very poor quality copies of genuine plates and he is selling the Yemen as a genuine used vanity plate but the Aden he is selling as a reproduction or replica that he says is used! There is no such thing as a vanity Yemen plate.
Buying poor quality reproduction plates like these means you will end up with scrap in your collection. Hopefully no one is ignorant enough to pay the very high price he wants for them.