If there isn’t already, I thought it would be nice to have a thread of sellers, stores, distributors, etc. No secrets, your sellers will appreciate you for it
PWCC will be a good choice, also there are many E4 members there. In general any high rep seller with 100% feedback will be ok, that’s why you can trust Ebay policies
I personally buy all non-holos (or modern cheap holos) from Troll&Toad, but then look for more valuable holos on ebay. Buying individually kinda sucks though.
I will tell you what no one else wants to because It’s the most lucrative to flippers and collectors! The best two places to buy cards are the following: Ebay: buy-it-now newly listed, and locally (make FB and craigslist ads in your area WTB POKEMON) and people will sell to you even if you say in your ad you pay 50% of online prices, people are willing to give you stuff for free sometimes even! Most of the local stuff is modern, but I’ve found over 90% of my WOTC collection locally (in a city of 70k people) and I have easily 5 figures worth of wotc in my collection from just March of this year buying locally. Its out there lots and lots of it. Hopefully you are near a dense city and are willing to meet people (wear your mask )
Portuguese, Indonesian, and sometimes Korean cards I buy through a middleman in Brazil, Indonesia, and South Korea respectively
Misprinted cards through the Gotta Misprint 'Em All Facebook group
Misprinted Yu-Gi-Oh cards through the Yu-Gi-Oh Misprint Collectors and Yugioh Misprints Facebook groups
Dutch, Polish, and Russian cards I no longer need since I have all Pikachu cards for those languages. But Dutch I would buy at marktplaats.nl (a Dutch domestic website similar to eBay - also owned by the same company - but I’m Dutch myself, so those are no issue). Polish cards I’ve bought from various places. And Russian cards I used to have a middleman for as well years ago, although we’ve lost contact.