Serial #s rule.
It would be fine if serial #s were required for TV, PC, etc type of posting.
A manufacturer could determine if that was a legit item if if it was bogus they could ask eBay to contact the poster as to why it was removed.
It would be great for say HP to find a laptop that is new and was stolen from their shipping dock.
We need to terminate the allowance of crime in the name of free speech.