Buy from listings with many sales and good reviews.

Look for reviews with real images and real seeming phrases in many languages, not 10 accounts all posting the same phrase with no pictures.

Buy from stores with a name, preferably who have established a "brand" for themselves across many products. UGreen are a great example of this for USB gadgets.

Don't buy from stores named Shop195772040, these will take your money and disappear or ship fakes. Don't buy suspiciously cheap items with no sales, these will do the same.