Want to buy:
Old Pokémon advertisements.
I’m especially fond of posters and materials relating to the New York Pokémon Center.
I am willing to pay fair prices and have bought flats as small as brochures and post cards to three-foot bus advertisements. Anything cool! Will consider early, early league advertisements on a case and price basis.
Greatly prefer English.
Not sure if you just want to collect or if it is for documentational purposes. If you are interested I am working on a project to document Swedish advertisement, League papers and other translated media. I won’t sell them but can send a digital package of scans in the future if you’d like 
It is for documentation! But also for my collection. Hahaha.
So I am excited for your scans and disappointed you won’t sell them to me! 
I’ll PM you and get you my email and we can talk about it some more, pal.
If you are interested, I also have old french distributor posters like that:
I will not sell them, but it is cool for documentation.
Totally forgot about the STS! I attended them way back when they were in my home state (NJ). Fond memories!