How do you shop from OEMs(original equipment manufacturer) and buy only one item at a time? Have tips for buying from OEMs efficiently? It sounds empowering, but I'm unsure how to do it.

I'm broke atm(probably for a long time.) I'm not serious about buying anything right now, but the next time I come across money way into the future, I will need to buy stuff. I'm most focused on learning how to buy clothing from OEMs. I will not be buying accessories first thing, but I'm still interested in how to window shop for them to learn how to buy them later on. How do you find single items from OEMs of both, luxury and non-luxury brands?

For those who haven't heard about OEMs, idk much, but I saw both, Chinese manufacturers and customers talk in video shorts about how you can buy things like a genuine Hermes purse for $2. (Idc about Hermes purses, but they stated something important.) From my memory of what the people on social media keep saying: Workers in China start and finish the genuine designer product. Then it's shipped to a different country where they apply the logo... If they apply the logo in Italy, it will say "Made in Italy." If the logo is applied in France, it will say "Made in France." Even if it's all made in China minus the logo. That logo is what you're paying hundred to thousands for. The product alone without the logo is much cheaper. You can buy high quality designer goods for cheap from OEMs.

Tl;dr: People on social media have shared that you can buy logo-less genuine designer clothes and accessories for little money if you buy it straight from original manufacturers in China.