numismatist
There does not appear to be a name for it.
Weird
Quodophile.
Some of the names given for a person who collects trains:model train collectormodel train enthusiasttrain modeler
whatzername says: a person who collects autographs is a philographist... autograph collector :)
Gun-collector
miser
Eccentric.
simple - eraser collector!
Arachnid collector or Arachnophile.
The name for a postcard collector is a deltiologist x