Pkonno2002 is a Japanese seller known for selling extra copies of extremely rare cards, like three Pokémon Illusustrator cards, SNAP Photo Contest cards, Trophy cards, and more. We have this thread showing all his rare card sales thus far to give you an idea. This began around January 2017, and he’s sold quite a few pretty ridiculous cards over time for thus far little over 1 million USD in value last time I checked.
Greetz,
Quuador