We were on a PS Caravan today and she opened it up and all the regulars immediately were saying that it was staged.  It was a 20x10 I think, and in the back of it the entire space was filled with perfectly new usps boxes all labeled with red marker stacked perfectly facing us.  Some said comics, some collectibles, etc.  the front had some random stuff but not much.  One of the old timers picked up a little pebble and threw it at the boxes assuming they were empty, and yep, the entire thing came crashing down.  Absolutely empty every one of them.  The auctioneer came over, saw what had happened, said anyone got $1?  Someone said yes, and he said SOLD DONE, shut it.  So I thought was really cool of him to not play the game that the owner had set up.  We always hear or read about such set ups, but it's almost hard to believe until you witness it first hand.