My question was censored when I raised the issue on a live Q&A during the 2021 eBay Open regarding Chinese sellers adversiting aftermarket Made in China car parts as being Genuine OEM in the eBay Motors - Parts & Accessories.
Just 2 days ago, I couldn't wrap my head around the pricing offered on a "Genuine OEM" "Made in Germany" BMW part until I realized the part was not authentic and the seller was located in China despite falsely providing some NY address as item location. He has a flood of negative feedback after astute buyers realize what they actually bought is not what was adversited but yet still carries on business. There are other examples in almost every category.
These are high volume sellers, very profitable for eBay and the commissions generated probably outweigh the reputational risk for them; that's why I don't foresee this problem going away.