You gotta think this out, guys, as Joe implies.
One of the most often heard lines that a table holder hears is "Hey, I've got a friend who wants that. I'll tell him about it."
So would a dealer pull an item off his table without payment in anticipation of the phantom friend hurrying over to purchase sometime later that day? I've yet to have any of those friends stop by my table later.
Even less likely, would a dealer pull the item, email the friend, probably have to send photos of the item, take it home, wait for the "check that's in the mail", then pack and ship???? Most sell at shows to avoid shipping.
Gotta be realistic here.
Jim