Hi ! Welcome 
Nice to see a new user from the United States, let me know if you need any help !
Thanks great to be here, Very nice site would love to see this grow I havent been able to find to many on here from the US not that I have a problem sending international just takes longer and increases cost.
Learning my way around the site takes a few but the help videos are great, there does seem to be a large section of pokemon league promo cards missing from the selection, Is there any user ability to add?
How about other offical league items, They are out of print and discontinued now but Badges/patchs/charms things like that
Hi !
I havent been able to find to many on here from the US not that I have a problem sending international just takes longer and increases cost.
I totally understand, hopefully the site will have more US users over time 
there does seem to be a large section of pokemon league promo cards missing from the selection, Is there any user ability to add?
You can submit a list of sets and cards, here :
https://en.pokechange.net/forum/section:cs11
And I'll try to add them to the site 
How about other offical league items, They are out of print and discontinued now but Badges/patchs/charms things like that
Adding other products is definitely possible.
The complicated part is to build the inventory, any list of products is welcome and could be added to the site over time.
Thank you very much for your interest.
HI
Name is Bill, Located in Mass been around pokemon cards since they first released.
New to the site but not pokemon or trading. Slowly adding my available cards for trades. Hoping to come here make some trades complete some sets. Maybe meet a few long time trade partners as I am always looking for something. Please check out my page