[H] Ebay keys

[Winterlight]

If you go on Ebay you see a slew of upgrade and professional keys for 
next to nothing.

https://www.ebay.com/sch/i.html?_nkw=windows%207%20pro%20anytime%20upgrade%20key
these can't be legit... can they? I thought Ebay wouldn't allow 
fraudulent items or copywrite violators.