The 'Whats it worth" thread didn't work because people kept posting in other sections anyway, it was supposed to clear out all those into a section on their own, didn't work
As for not commenting on F/S thread, I have to disagree, some people of course will underprice everything, that's just the way they are, on the other hand, some will over price everything and those people may never sell their car. All people are doing is giving advice to the seller which may or may not help with a quicker sale and fairer price for everyone. If seller don't want advice or comments about overpriced items, they can request the thread is locked as Ekona said, or advertise elsewhere