I have been looking for over 2 years now.
I have come close by never got it over the line.
I am looking to spend $3k-$5k on a “Pokemon 1st Movie, Pikachu Black Star Promo #4 - Inverted Stamp Error”
Price is also up for negotiation if needed
Please message me here with a picture or on Instagram @tcg_Pikachu
If you can link me with a seller and the sales goes through. I will pay you.
Thanks Pokefam I am only missing a few pikachus 
(PS also looking for the SAMPLE stamp pika - if you know you know)