I been watching this and was just going to be silent. But lets flip
your last comment. Say you are the person that gave your sign to auction house and they don't list a grade or make a comment as to rarity. You would fire them right? They are a service and its their duty to serve both seller and buyer. Its your duty to do your homework if you agree with their value or not. Auctions are listed well in advance to allow buyers to make their on mind up. And cars are cars,which is a whole other deal. But I grasp your point your trying to make by comparison.
