I've seen COUNTLESS fakes on amazon, the amount of terrible rep yeezys listed there is crazy. Take for example, this listing:
https://www.amazon.com/adidas-Performance-Ultra-Boost-Running/dp/B00WW7JCCG
supposedly sold by "adidas" but if you scroll down to the reviews, you see seething reviews talking about how the shoes they received were fake. of course, you never know, but when it comes to sneakers i'd stick to retailers or reputable reselling platforms like stockx or goat.