In May 2014 ismaa3 (aka pasapik) from Spain was trying to sell these plates.
There is a Melilla plate from North Africa that has no signs that it was ever in the sun and sand of the desert and an Equatorial Guinea plate that has a registration which would have been long after they stopped using Spanish bases. Both seem to have holes marked by the same screw he usually uses and both, I am sure, are mint and unused. Very suspicious.
There is also a plate that he believes is a presidential plate from Dominica – not to be confused with the Dominican Republic. The coat of arms on it is actually not quite right and he appears to have drilled 2 holes in this mint looking Perspex (Plexiglass) plate and tried to distress the holes.
Buying mint plates means you can end up with rubbish in your collection.