Why can't eBay identify fraudulent listings?

[stuffimadeinmyshed]

Spoiler

It's common practice by fraudsters to list high value items at lower than market value, and to include two images. One of the item for sale, and the other is a black and white image with a message to contact them at an email address.

It would be trivial for eBay to run an algorithm against upload images, to identify these.

If someone's selling a motor vehicle and one of the images is 75% white and 25% black, it's a fraudulent listing.

It's not difficult.

If you look at high value motor vehicles, you see them all of the time.

I know the fraudsters would then adapt to this; but it takes low effort on eBay's part and they ought to want to stop fraud, surely?

[tobiasd4]

Ebay don't check listings, they rely on us reporting them.

These scammers are adept at putting up 1000's of scam listings.

I am sure ebay could do a lot more to detect it though.